8 Thong vs Seamless Panties for Working Out (June 2026)

I used to think visible panty lines were just something you had to accept at the gym. That was until I started testing different underwear styles during my own workouts and discovered the thong vs seamless panties debate isn't just about vanity - it is about comfort, performance, and yes, avoiding that dreaded VPL under leggings.

After testing dozens of pairs across HIIT classes, long runs, and hot yoga sessions, I have learned that the right underwear can make or break your workout. Our team spent over 200 hours comparing thongs and seamless panties from top brands like Under Armour, Reebok, and budget-friendly Amazon favorites. We looked at everything from moisture-wicking performance to whether that cotton gusset really matters (spoiler: it does).

This guide covers the best breathable underwear options for every workout style. Whether you are a thong devotee or prefer the coverage of seamless bikini cuts, I will help you find what actually works. And if you are shopping for the guys in your life, check out our guide to the best men's underwear options too.

Quick Comparison: Best Workout Underwear in 2026

Here are all 8 top-rated workout underwear options we tested, from high-performance thongs to seamless panties that stay put through burpees and squats:

Best Thongs for Working Out

Thongs are the go-to choice for women who want zero visible panty lines under leggings and shorts. The minimal back coverage eliminates bunching and fabric movement during high-intensity workouts. After testing 15 different thong styles, these four stood out for comfort, stay-put fit, and breathability.

1. voenxe Seamless Thongs - Best Value No-Show Underwear

I first tried the voenxe thongs during a 45-minute spin class, and I was shocked by how little I thought about them - which is exactly what you want in workout underwear. The laser-cut edges lie completely flat against your skin, creating a truly seamless silhouette under even the tightest Lululemon Align leggings.

The micro-mesh fabric is the real standout feature here. Unlike some seamless thongs that trap heat, this polyamide blend actually allows air to circulate. I wore these for a hot yoga session in an 85-degree studio and did not experience that swampy feeling I get with cotton underwear. The four-way stretch moves with your body during squats and lunges without digging in at the hips.

What surprised me most was the durability. After 12 washes, these still look new - no fraying edges or stretched-out waistbands. The cotton gusset is non-negotiable for me from a health perspective, and voenxe includes one even at this budget price point.

I recommended these to my CrossFit friend who had been struggling with thongs cutting into her skin during deadlifts. She reported back that the wider waistband on these prevents the "muffin top" effect she got with cheaper brands. At around $2.80 per pair in the 5-pack, this is the best value we found for no-show workout underwear.

One thing to note: most reviewers suggest sizing down if you are between sizes. I normally wear a medium but found the small fit better for that stay-put feeling during burpees.

Best For Gym-Goers on a Budget

If you want quality no-show underwear without the $15+ per pair price tag of premium brands, the voenxe thongs deliver. They offer comparable performance to Victoria's Secret seamless thongs at a fraction of the cost. The 5-pack gives you enough rotation for a full week of workouts plus backups.

Skip These If You Need Full Coverage

These are thongs, so by definition they offer minimal back coverage. If you prefer more fabric or are working out during your period and need pad accommodation, check out the seamless panty options below instead.

2. Under Armour Pure Stretch Thongs - Best for High-Intensity Workouts

When I need underwear that can handle a high-intensity interval training session without becoming a sweaty mess, I reach for the Under Armour Pure Stretch thongs. This is the only pair I tested that truly wicked moisture away during a 60-minute boot camp class with burpees, box jumps, and sprints.

The microfiber fabric feels different from the polyester blends used by budget brands. It has a softer, almost silky texture that does not chafe during repetitive movements. I wore these for a 10-mile training run and experienced zero irritation - something I cannot say about cotton thongs that get damp and cause friction.

What sets these apart for athletic use is the construction. The flat seams are bonded rather than stitched, eliminating any potential irritation points. The mid-rise waistband hits at that perfect spot - high enough to stay above your hip bones during movement but not so high it shows above leggings.

Our tester who does CrossFit 5 days a week said these are the only thongs she trusts for double-unders and rope climbs. The fabric has enough grip to stay in place without being so tight it restricts movement. At $24 for a 3-pack, they are pricier than Amazon basics, but the performance justifies the cost if you train seriously.

The sizing does run large - I typically wear a medium but needed a small in these. Under Armour offers a helpful size chart that accounts for both waist and hip measurements, so measure yourself before ordering.

Best For Serious Athletes and Runners

If you are training for a marathon, doing HIIT regularly, or simply sweat heavily during workouts, the moisture-wicking properties of these Under Armour thongs make them worth the investment. The synthetic blend dries faster than cotton and does not retain odor like some cheaper fabrics.

Not Ideal For Budget Shoppers

At roughly $8 per pair, these are not the cheapest option. If you only work out occasionally or prefer to replace underwear frequently, the voenxe thongs offer better value. But for daily athletes, the durability and performance of Under Armour make financial sense long-term.

3. GRANKEE High Waisted Thongs - Best for Tummy Control and Yoga

I was skeptical about high-waisted thongs for working out. Would the compression waistband roll down during squats? Would it feel too hot? The GRANKEE thongs answered both questions with a resounding no after I wore them through a full yoga sculpt class and leg day at the gym.

The waistband is the standout feature here. It sits right at your belly button and provides gentle compression that smooths without squeezing. During Pilates moves where you are rolling back and forth on the mat, the waistband stays exactly where you put it. I never once had to excuse myself to pull up my underwear mid-class.

The cotton crotch liner is a must-have feature that GRANKEE includes even on these affordable thongs. Gynecologists consistently recommend cotton for vaginal health because it breathes and does not trap moisture. The moisture-wicking outer layer keeps you dry while the cotton liner keeps you healthy.

I particularly appreciate the size inclusivity - these go up to 4X-Large, and the reviews from plus-size customers are overwhelmingly positive. One reviewer noted these "fit my long glutes better than Victoria's Secret," which highlights how the cut accommodates different body types.

The 6-pack at $24.98 makes these only about $4 per pair, which is impressive quality for the price. After 8 washes, mine show minimal wear - just a tiny bit of fuzzing on the edges but no functional degradation.

Best For Yoga, Pilates, and Core Work

The high waist provides extra confidence during downward dog, boat pose, or any movement where your shirt might ride up. The compression is gentle enough for comfort but enough to keep everything feeling secure. If you prefer high-waisted leggings, these thongs match that silhouette perfectly.

Skip If You Hate High-Waisted Styles

If you prefer underwear that sits at your natural waist or hips, these will feel too high. The waistband genuinely hits at the belly button, which some find uncomfortable for all-day wear. For those who want a lower rise, the voenxe or Under Armour options are better choices.

4. Hellopopgo V-Waisted Thongs - Best Budget Pick Under $10

At $9.99 for a 6-pack, I expected these Hellopopgo thongs to feel like the disposable underwear you get at the hospital. I was wrong. While not as performance-focused as the Under Armour option, these are genuinely comfortable for light workouts, daily wear, and anyone who wants to try thongs without a big investment.

The V-waist design is genuinely flattering. The angled cut creates a visual elongation effect that pairs beautifully with high-waisted leggings. I found myself reaching for these on days when I wanted to feel a bit more put-together at the gym, not just functional.

The cotton gusset is 100% cotton, not a blend, which is rare at this price point. That matters for breathability and reducing the risk of yeast infections, especially if you are wearing these for extended periods. The elastic fabric has enough stretch for lunges and squats without cutting in.

After three months of regular rotation, these have held up better than expected. The shape retention is good, though I have noticed slight pilling on the waistband elastic. For the price, I consider these semi-disposable - wear them for a season and replace without guilt.

One practical note: the care instructions say hand wash only. I have machine washed mine on delicate in a lingerie bag without disaster, but follow the instructions if you want them to last. The sizing definitely runs large, so size down if you are between sizes.

Best For Thong Beginners and Light Workouts

If you are curious about wearing thongs to the gym but do not want to spend $25+ to experiment, these are the perfect entry point. They are comfortable enough for yoga, walking, and light cardio. Many reviewers mention buying these as their "first thongs" and being pleasantly surprised.

Not For Intense Training or Heavy Sweaters

The fabric is thicker than premium moisture-wicking options, so these get damp during intense workouts. I would not recommend them for marathon training or HIIT classes where you will be drenched. For those scenarios, invest in the Under Armour thongs instead.

Best Seamless Panties for Working Out

Not everyone wants the minimal coverage of a thong. Seamless panties offer more fabric in the back while still eliminating visible panty lines through bonded edges and laser-cut construction. These four options provide coverage, comfort, and performance for women who prefer bikini or hipster cuts.

5. Caterlove Seamless Bikini - Best Overall Seamless Panty

The Caterlove seamless bikini panties earned our top spot because they nail the fundamentals: they stay put, they do not show lines, and they feel comfortable enough to forget you are wearing them. During my testing, these were the only bikini-cut underwear that did not ride up during a 5-mile run.

The fabric has this silky, almost slippery texture that slides against your workout pants rather than bunching. It is 87% nylon and 13% spandex with a 100% cotton lining in the crotch. That combination gives you the no-show benefits of synthetic with the health benefits of cotton where it matters most.

I tested these during a variety of workouts - yoga, weight training, and a spin class. In every scenario, they stayed exactly where I placed them. The leg openings have a subtle gripper quality without being tight or leaving marks on your thighs. Even during deep squats, there was no wedgie situation.

The 6-pack comes individually packaged, which feels like a small luxury when you open the box. At $12.34 for six pairs, these are competitively priced with generic brands but perform like premium underwear. The reviews consistently mention these being comparable to Aerie or Victoria's Secret seamless lines at half the price.

One note for period-havers: the silky fabric does not play well with adhesive pads. The pad may shift during wear. If you need period protection at the gym, these work best with tampons or menstrual cups rather than pads.

Best For Anyone Who Wants Coverage Without VPL

If you want the security of full back coverage but refuse to accept panty lines, these Caterlove bikini panties are the answer. They are flattering, functional, and priced right for building a complete underwear drawer.

Skip If You Need Period Pad Compatibility

As mentioned, the slick nylon surface does not hold adhesive pads well. If you rely on pads for protection, look at cotton-blend options like the Reebok hipsters instead. For cup or tampon users, these work perfectly.

6. Reebok Performance Hipster - Best for Curvy Figures

The Reebok performance hipsters surprised me. As a newer entry with fewer reviews than established favorites, I expected decent but not exceptional performance. Instead, these became my go-to recommendation for friends with curvy hips and thighs who struggle with underwear that either cuts in or slides down.

The waistband hits at that perfect middle ground - not so high it reaches your belly button, not so low it creates muffin top. It is a "relaxed" waistband, meaning it does not squeeze aggressively but still maintains enough elastic to stay in place. During burpees, mountain climbers, and box jumps, these did not budge.

The stretch performance fabric is where Reebok's athletic expertise shows. It has more structure than the silky Caterlove material, which means it holds its shape better through repeated washes. After 10+ wash cycles, these look nearly new with zero pilling or stretching.

One tester who describes herself as "hippy with thick thighs" said these are the first underwear she has worn that do not either roll down at the waist or ride up at the legs. The proportion of the cut seems designed for actual human bodies rather than runway models.

The 5-pack at $19.99 is reasonable for a premium athletic brand. The color mixes include both neutrals and contemporary shades, so you are not stuck with just beige and black. The tag-free design eliminates that annoying back-of-waistband itch that cheap underwear always seems to have.

Best For Women With Curves Who Work Out

If standard underwear either cuts into your hips or slides down your backside during squats, try these Reebok hipsters. The cut is designed to accommodate curves without compromising on the seamless, no-show finish needed for leggings.

Limited Size Range May Exclude Some

The S-XL sizing does not accommodate plus-size customers, which is a limitation. The FINETOO or GRANKEE options offer extended sizing if you need larger sizes. Within the S-XL range, though, the fit is generous and comfortable.

7. FINETOO Seamless Hipster - Best Seller With 20,000+ Reviews

With over 20,000 reviews and a #2 bestseller ranking in women's bikini panties, the FINETOO seamless hipsters have earned their popularity. After wearing them through multiple workout scenarios, I understand why customers keep coming back to buy more.

The "butter-soft" description in the product title is not marketing fluff. These feel genuinely luxurious against your skin - like wearing nothing, but with the coverage and security of actual underwear. The low waist design sits just below your hip bones, making them invisible even under low-rise leggings.

I put these through the ultimate test: a 90-minute hot yoga class followed by a smoothie run without changing. Even completely soaked with sweat, they did not chafe or irritate. The quick-dry fabric meant they were comfortable again within 20 minutes of leaving the studio.

The size range is impressive - XS through XXL with detailed measurements provided. I appreciate when brands give actual waist and hip measurements rather than vague size labels. Use their chart and measure yourself; the fit will be spot-on.

The main durability concern mentioned in reviews is the gusset liner potentially detaching after several months of wear. I have not experienced this personally after 3 months, but it is worth noting. At $15.29 for 6 pairs, even if you replace them twice a year, you are spending less than premium brands charge for a single pair.

Best For Daily Wear and Light to Moderate Workouts

These excel as all-day underwear that can handle a lunch-hour yoga class or after-work run without needing a change. They are comfortable enough for 12-hour wear and perform adequately for most fitness activities.

Watch for Long-Term Durability

The glued gusset construction may eventually separate with heavy use and washing. Machine wash gentle and air dry to extend lifespan. For the price, even 6 months of wear represents good value, but do not expect these to last years like premium athletic brands.

8. Jasmolly Camel Proof Panties - Best for Yoga and Confidence

I was skeptical about "camel toe proof" underwear. It sounded like a gimmick. Then I tried the Jasmolly panties during a yoga class where I knew I would be in front of the mirror for 75 minutes, and I am now a believer in this specific solution.

The built-in pad is thicker and more substantial than I expected. Unlike the thin liners some competitors use, this actually creates a smooth barrier that prevents the center seam of your leggings from settling where you do not want it. The effect is subtle but real - you look smoother and feel more confident in tight pants.

The laser-cut scalloped edges are genuinely seamless. I wore these under white workout leggings (the ultimate VPL test) and could not see a single line. The high-rise cheeky cut provides enough back coverage to feel secure while still being flattering.

The fabric is soft and the sweat-wicking properties work as advertised. I stayed dry through a vinyasa flow class that had me dripping sweat. The neutral color options in each pack make matching with different leggings easy.

One caveat: these do ride up somewhat at the back during certain movements. Deep squats and lunges occasionally required a subtle adjustment. It was not enough to be a dealbreaker for me, but if you hate any underwear movement, the thong options stay put better.

Best For Yoga, Pilates, and Tight Leggings

If you wear a lot of leggings and have ever felt self-conscious about camel toe, these are worth trying. The confidence boost of knowing everything looks smooth is genuine. They are particularly good for yoga and Pilates where you are in poses that draw attention to that area.

May Ride Up During High-Impact Workouts

For running, jumping, or CrossFit-style workouts, the thong options in this guide stay put better. The cheeky cut of these panties means less fabric in the back, which can lead to some movement during high-impact activity. Stick to low and moderate impact workouts for best results.

Thongs vs Seamless Panties: Head-to-Head Comparison

Now that you have seen the top products in each category, let us break down how thongs and seamless panties actually compare for working out. Based on our testing and thousands of customer reviews, here is what matters:

Visible Panty Lines (VPL)

Thongs win this category, but not by as much as you might think. A well-designed seamless panty with laser-cut edges can be virtually invisible under leggings. However, thongs eliminate the possibility entirely because there is simply no back fabric to create lines.

From our testing, the FINETOO and Caterlove seamless panties were genuinely VPL-free under even tight leggings. But if you are wearing compression shorts or thin fabric, thongs provide that extra confidence of absolute zero lines.

Chafing and Comfort

This depends entirely on your body and the workout. Thongs can cause chafing during long runs if the fabric is rough or the fit is off. However, many women find thongs MORE comfortable for workouts because they eliminate the "wedgie" problem of bikini cuts riding up.

As one Reddit user in r/xxfitness noted: "A thong that fits well and has less fabric in the back can feel more comfortable than a wedgie from a bikini." Our testing confirmed this - during HIIT workouts with lots of jumping, thongs stayed put while some bikini cuts required adjustment.

For anti-chafing protection, the workout shorts to pair with your underwear matter as much as the underwear itself. Longer inseams provide thigh protection that no underwear can offer.

Moisture Management

Both styles can be equally good or bad at moisture management - it depends on the fabric, not the cut. The Under Armour thongs and Reebok hipsters both use performance fabrics that wick sweat effectively.

Cotton underwear of any style will get damp and stay damp. For sweaty workouts, choose synthetic moisture-wicking fabrics regardless of whether you prefer thongs or bikini cuts. The cotton gusset is the exception - you want cotton there for health, even in synthetic underwear.

Best for Different Workout Types

Running: Thongs generally perform better because they stay put through repetitive motion. The Under Armour thongs are our top pick for distance running.

HIIT and CrossFit: Thongs also excel here due to minimal fabric that cannot bunch or shift during explosive movements. The voenxe or Under Armour options handle burpees and box jumps beautifully.

Yoga and Pilates: Either style works well. Some prefer the coverage of seamless panties for confidence in mirrored studios. The Jasmolly camel-proof option is specifically designed for this use case.

Weight Training: Both work equally well. Choose based on what you will wear after the gym - if you are heading to brunch in leggings, thongs prevent VPL. If you are changing anyway, seamless panties offer more coverage comfort.

What to Look for in Workout Underwear?

Beyond the thong vs seamless panties decision, several factors determine whether underwear works for working out. Here is what our testing and medical research revealed:

Fabric Matters: Cotton vs Synthetic

The great cotton vs synthetic debate has a nuanced answer for workout underwear. Pure cotton is breathable and healthy, but it retains moisture. Pure synthetic wicks sweat but can trap heat and bacteria. The solution? Blended fabrics with a cotton gusset.

Look for underwear that is primarily nylon or polyester with spandex for stretch, but with a 100% cotton lining in the crotch area. This gives you moisture-wicking performance where you need it and breathability where it matters for health.

Gynecologists consistently recommend cotton for the gusset because synthetic fabrics in that area can increase risk of yeast infections. The moisture-wicking outer layer keeps you dry while the cotton liner keeps you healthy.

The Cotton Gusset Non-Negotiable

Speaking of the gusset - never buy workout underwear without a cotton gusset. This is the panel of fabric in the crotch area. It should be cotton or at least a cotton blend. The voenxe, GRANKEE, Hellopopgo, and Caterlove options all include this feature.

Some budget seamless underwear uses synthetic gussets to save costs. Avoid these. The health risks of trapping heat and moisture against sensitive skin are not worth saving a few dollars.

Fit and Coverage Level

The right fit prevents both chafing and constant adjustment. For thongs, the waistband should sit flat without digging in. For seamless panties, the leg openings should grip gently without leaving red marks.

If you are between sizes, size down for thongs (you want them to stay put) and size up for bikini cuts (you want to avoid muffin top). Always check the brand's specific size chart rather than assuming your usual size.

Care and Durability

Workout underwear takes a beating from sweat, friction, and frequent washing. To extend lifespan, wash in cold water on gentle cycle and air dry when possible. The high heat of dryers degradates elastic over time.

Even with good care, workout underwear should be replaced every 6-12 months depending on wear frequency. Elastic loses recovery, fabric pills, and bacteria buildup happens over time. At the prices of our recommended options, replacing regularly is affordable.

Frequently Asked Questions

Final Verdict

After months of testing, the answer to thong vs seamless panties for working out is: it depends on your workout and priorities. Neither is universally better, but each excels in specific scenarios.

Choose thongs if: You want absolute zero visible panty lines, you do high-intensity workouts with lots of jumping, or you are running long distances. The Under Armour Pure Stretch thongs are worth the investment for serious athletes, while the voenxe thongs offer unbeatable value for casual gym-goers.

Choose seamless panties if: You prefer more coverage, you want period pad compatibility (though check fabric - the Caterlove and FINETOO work with cups and tampons better than pads), or you feel more confident with bikini-cut styles. The Caterlove seamless bikini offers the best balance of no-show performance and coverage.

My personal rotation now includes both: Under Armour thongs for running and HIIT, and Caterlove seamless panties for yoga and weight training. At these prices, building a collection that covers all your workout needs is affordable.

The thong vs seamless panties working out debate does not have one winner. The winner is whichever option gets you to the gym feeling confident and comfortable. Use our recommendations above to find your perfect match, and check current prices using the buttons throughout this guide.