Prevail · Classic Brief
Previal was born from a simple belief: every man deserves the luxury of effortless performance. When heat builds and fabric restricts, our engineered knit becomes like a second skin—cooling when you push hard, supporting when you move fast. Strategically placed airflow works with your body's natural cooling system, while ultra-light stretch adapts from office hours to high-intensity training.
- Breathable design
- Smooth 4-way stretch
- Moisture wicking finish
- Quick dry
- Seamless leg openings
- Antibacterial
- Odor resistant
FABRIC & CARE INSTRUCTIONS
- 85% Polyamide (Nylon), 15% Elastane (Lycra®)
- Certified Safe: OEKO-TEX® STANDARD 100 #HKKH 029897 by TESTEX
- Machine wash warm, hang dry, wear often
Size & Fit Suggestion
- Reviews say the fit is True To Size. Aeroskyn™ is designed to stretch and form to your unique physiology. We recommend using our size chart as a guide.
- Model is 6'1", 175lbs, wearing size M.
Best Pair Guarantee
If you're not satisfied with your first purchase, we'll make it right by issuing a refund or exchanging the item even if it has been worn. So If you've ordered multiple pairs of Aeroskyn on your first order, we suggest wearing one pair before opening the other pairs you've ordered.
Choose options
- FDFelipe D.Verified BuyerReviewingPrevail · Classic Brief MI recommend this productRated 5 out of 5 stars7/20/25So soft
Excellent support and breathability perfect for daily wear.
UUnderXLabs7/21/25Hi Felipe! So glad they're working perfectly for daily wear! That breathable support is what we're all about. Enjoy!
- FDFelipe D.Verified BuyerReviewingPrevail · Classic Brief XLI recommend this productRated 5 out of 5 stars7/10/25My whole family switched
12-hour coding sessions in these feel like wearing pajamas, but they look professional enough for surprise Zoom calls. The waistband doesn't constrict when I'm slouched in my ergonomic chair for hours. Keyboard warrior approved no wedgies during crunch time, and the breathability prevents that weird gamer sweat situation. My standing desk marathons just got 23% more comfortable.
- SWScott W.Verified BuyerReviewingPrevail · Classic Brief XXLI recommend this productRated 5 out of 5 stars7/10/25Golf approved
After years of searching, I can confidently say these are the best underwear available. Every detail is engineered for maximum comfort and performance.
UUnderXLabs7/19/25Hi Scott! Thanks so much for the fantastic 5-star review! We're absolutely thrilled to hear that the Prevail has finally ended your years-long search for the perfect underwear - that's exactly what we hoped to achieve! It's wonderful that you're experiencing how every detail has been thoughtfully engineered for maximum comfort and performance. We put a lot of effort into perfecting each element, from the seamless construction to the moisture-wicking fabric, to create underwear that truly performs when it matters most. Golf-approved comfort is high praise - we know how important it is to have underwear that moves with your swing and keeps you comfortable through all 18 holes! We really appreciate you taking the time to share your experience!
- BHBeckett H.Verified BuyerReviewingPrevail · Classic Brief MI recommend this productRated 5 out of 5 stars7/10/25Top
Consulting firm essential.When living out of a suitcase M-Th, these pack small and perform big.
UUnderXLabs7/19/25Hi Beckett! Thanks so much for the fantastic 5-star review! We're absolutely thrilled to hear that the Prevail has become your consulting firm essential - that's such high praise! It's wonderful that they're delivering that perfect combination of compact packing and big performance during your heavy travel schedule. We put a lot of effort into creating underwear that takes up minimal suitcase space while still providing maximum comfort and support when you're living on the road Monday through Thursday. That pack-small, perform-big balance is exactly what we designed them for - we know how important it is to have reliable, comfortable essentials that don't weigh down your luggage but still deliver when it matters most. We really appreciate you taking the time to share your experience!
- JKJareth K.Verified BuyerReviewingPrevail · Classic Brief XXLI recommend this productRated 5 out of 5 stars7/10/25I bought three pairs after trying them just once
After years of suffering through uncomfortable dress socks and underwear combinations, these solved all my problems.The seamless design prevents any lines under my over-the-calf hose while keeping me comfortable during all-day shareholder meetings.
- BCBenjamin C.Verified BuyerReviewingPrevail · Classic Brief SI recommend this productRated 5 out of 5 stars7/10/25Gym bag staple
These have become my go-to underwear for everything from work to workouts. The fabric moves with my body without any restriction. The moisture control keeps me dry and comfortable in all situations. They don't ride up or bunch like other brands I've tried. I've washed them many times and they still look and feel great.
UUnderXLabs7/19/25Hi Benjamin! Thanks so much for the fantastic 5-star review! We're absolutely thrilled to hear that the Prevail has become your go-to underwear for everything from work to workouts - that versatility is exactly what we designed them for! It's wonderful that you're experiencing how the fabric moves seamlessly with your body without any restriction, and that the moisture control is keeping you dry and comfortable in all situations. We put a lot of effort into creating that perfect balance of flexibility and performance that works whether you're in the office or hitting the gym. We're especially glad to hear they're staying perfectly in place without riding up or bunching - that smooth, comfortable fit throughout the day is so important! It's fantastic that they're maintaining their look and feel wash after wash too - durability for your gym bag staple is exactly what we aimed for. We really appreciate you taking the time to share your experience!
- VBVaughn B.Verified BuyerReviewingPrevail · Classic Brief XSI recommend this productRated 5 out of 5 stars7/10/25No more uncomfortable bunching during long drives
The fit is absolutely perfect - snug without being restrictive. They stay in place all day with no adjusting. The fabric is thin but doesn't feel flimsy. I especially appreciate the temperature regulation. Worth every penny for the comfort.
- HMHugo M.Verified BuyerReviewingPrevail · Classic Brief SI recommend this productRated 5 out of 5 stars7/9/25I can wear these all day without noticing
When giving keynote speeches, confidence starts with comfort.These keep me completely at ease on stage without any distracting adjustments needed - the seamless design is invisible under my presentation suit.
- PSPax S.Verified BuyerReviewingPrevail · Classic Brief MI recommend this productRated 5 out of 5 stars7/9/25The waistband is comfortable
I've completely converted my entire drawer to this brand after trying just one pair. The style is perfection - no more riding up during my construction work, no more sweaty discomfort in the summer heat, and the waistband actually stays put when I'm bending and lifting all day. Three years and countless washes later, my first pairs still look and feel like new. My coworkers kept asking why I wasn't constantly adjusting like them, now half the crew has switched brands. Worth every penny for the comfort and durability - I just wish they'd release new colors faster because I want them all!
- JDJeremy D.Verified BuyerReviewingPrevail · Classic Brief LI recommend this productRated 5 out of 5 stars7/9/25Makes me more confident
As a touring musician spending hours on buses and planes, these have become my essential travel companion. The moisture-wicking fabric keeps me fresh during long travel days, and they don't wrinkle under stage clothes. The waistband stays comfortable even during 8-hour bus rides. After six months of constant touring, they've held up better than any underwear I've owned - no stretched-out elastic or fabric pilling. The only downside is needing to handwash them sometimes on tour, but they dry incredibly fast. Worth every penny for life on the road.