I've needed some new underwear and purchased a myriad of single pairs from different companies. The crossfly won hands down for support and comfort. Grabbed 1 pair of short running socks to see how... See more
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Review summary
Created with AI, based on recent reviews
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I like the product and my experience of customer service has always been good. The “uplift” that these pants provide is great and better than others I have tried. My only criticism is that the produ... See more
This was my third purchase. Having tried various makes of underwear, Crossfly are the most comfortable I've worn, and the the way the fly is designed, no more fumbling around. Slowly, because they... See more
Company replied
At 78 and having always worn briefs type underpants I decided that perhaps I would try boxers. I tried pairs from a well know High St store and also from a well know brand of boxers. Neither provided... See more
Company replied
Company details
About Crossfly
Written by the company
Crossfly was created to redefine everyday comfort for men. For too long, men have settled for outdated designs and average-quality underwear, while women’s underwear has evolved with innovation, support, and premium fabrics. We’re here to level the playing field — with performance-driven, intelligently designed products that put comfort first.
Born from a small team of UK and US sportswear professionals with decades of experience in product innovation and marketing, Crossfly was created with a simple mission: to elevate men’s everyday comfort through intelligent design, premium quality, and sustainable thinking.
We’ve poured our expertise into creating a lifestyle brand that puts performance, durability, and comfort first. Our underwear and socks aren’t just everyday essentials — they’re your go-to, must-have gear that supports you through work, sport, travel, and everything in between. With every Crossfly product, you’ll feel the difference from the moment you put it on.
What Sets Crossfly Apart?
Unmatched Comfort: Our Cocoon internal pocket system offers all-day support, eliminates friction, and keeps you cool — so you can focus on life, not discomfort.
Innovative Design: The X-Fly reimagines the traditional Y-front with a faster, smarter, one-handed access system that just makes sense.
Premium Fit: Our ZeroFold360™ Waistband moves with your body and stays smooth — no rolling, no digging, just pure comfort.
Feel-Good Products in Every Way We don’t launch anything unless it improves on what came before. That means using superior materials that feel better and last longer than the competition. And where possible, we choose sustainable options, from responsibly sourced fabrics to 100% recyclable packaging. Because looking after the planet is part of feeling good, too.
Our Vision: Take Comfort to the Extreme Whether you're pushing limits or just getting through a long day, Crossfly is designed to move with you, support you, and make you feel great doing it. Once you’ve worn Crossfly, you won’t want to go back.
Discover the Crossfly difference at crossfly.com
Born from a small team of UK and US sportswear professionals with decades of experience in product innovation and marketing, Crossfly was created with a simple mission: to elevate men’s everyday comfort through intelligent design, premium quality, and sustainable thinking.
We’ve poured our expertise into creating a lifestyle brand that puts performance, durability, and comfort first. Our underwear and socks aren’t just everyday essentials — they’re your go-to, must-have gear that supports you through work, sport, travel, and everything in between. With every Crossfly product, you’ll feel the difference from the moment you put it on.
What Sets Crossfly Apart?
Unmatched Comfort: Our Cocoon internal pocket system offers all-day support, eliminates friction, and keeps you cool — so you can focus on life, not discomfort.
Innovative Design: The X-Fly reimagines the traditional Y-front with a faster, smarter, one-handed access system that just makes sense.
Premium Fit: Our ZeroFold360™ Waistband moves with your body and stays smooth — no rolling, no digging, just pure comfort.
Feel-Good Products in Every Way We don’t launch anything unless it improves on what came before. That means using superior materials that feel better and last longer than the competition. And where possible, we choose sustainable options, from responsibly sourced fabrics to 100% recyclable packaging. Because looking after the planet is part of feeling good, too.
Our Vision: Take Comfort to the Extreme Whether you're pushing limits or just getting through a long day, Crossfly is designed to move with you, support you, and make you feel great doing it. Once you’ve worn Crossfly, you won’t want to go back.
Discover the Crossfly difference at crossfly.com
Free Shipping
Written by the company
- With any purchase above $60/£50
- Shipping costs sucks. We know it. We try to be as fair as we can and absorb the cost so you don't have to. We have a low threshold for this reason so you can enjoy free shipping (most of the time).
Crossfly Promise
Money Back Guarantee on your First Pair
Get your money back if you're not 100% happy.
Contact info
United Kingdom
- hello@crossfly.com
- crossfly.com
Bestselling styles
4.5
Excellent
441 reviews
Replied to 100% of negative reviews
Typically replies within 1 week
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
Easily the most comfortable underwear…
Easily the most comfortable underwear for sport
19 January 2026
Just what I needed!
I was looking for a top opening fly on my underwear and as my previous company had stopped making them I thought I'd lost out. Very pleased with my Crossfly purchase! Comfortable and smart too!
22 January 2026
I LOVE CROSSFLY PRODUCTS!
19 January 2026
Very comfortable and a great product.
19 January 2026
Fabulous boxers I always order large…
Fabulous boxers I always order large but there slightly to big I will order medium the next time
14 January 2026
Crossfly for the WIN!!!These are
These are, by far, the most comfy pair of trunks Ive ever had. I ordered a size that was too large and Crossfly sent the correct size with no questions or issues. I'll be ordering many more pairs now that I found my size!!
14 January 2026
Reply from Crossfly
Hi James, we're sorry to hear you haven't had a great experience with our product. Yes, our product is naturally stretchy and that's the reason why we recommend to drop a size when it comes to the IKON style. If you need any assistance with your order , please do not hesitate to contact us, we'd be happy to help you. All the best, Crossfly.
No further comment
2 January 2026
Soft, comfy but grouchy about the pouchy
The material is very soft and comfortable. The pouch is not quite as separating as it professes to be. It might be perfect if you have low hanging fruit and rarely move however I found the natural movement of said fruit as well as general, sitting, slouching, standing, walking, etc. resulted in the pouch not managing to contain the goods without manual intervention. Access from the front fly is handy but takes some adapting to but that is largely due to muscle memory. I've tried Kula, Oddballs and Step One. They all have pros and cons. I wouldn't dismiss buying more of these. Sizes are larger than other brands though . I usually wear XL but went for L this time as per site advice and they are a good fit.
2 January 2026
Reply from Crossfly
Thanks so much for taking the time to leave such a detailed and thoughtful review — we really appreciate it.
We’re glad to hear you found the fabric soft and comfortable, and that the fit worked well after sizing down. Your comparison with other brands and your notes on the pouch performance during everyday movement are especially helpful for us, as real-world feedback like this directly informs future design improvements.
The fly access does take a little getting used to, as you mentioned, and it’s good to hear that it became more intuitive with time. While our pouch won’t suit everyone’s anatomy or preferences perfectly, we’re pleased that you still see value in the product and wouldn’t rule out buying more.
Thanks again for your honest insights — they help us refine what we do and make better products going forward.
Product doesn’t breathe well and sack…
Product doesn’t breathe well and sack for nutts is not big enough
9 January 2026
Reply from Crossfly
Thanks for sharing your feedback — we’re sorry to hear the product didn’t meet your expectations.
The fabric used is Modal, which is naturally breathable and designed to regulate temperature, but we appreciate that breathability can feel different depending on body type, fit, and conditions. As for the pouch size, we understand that anatomy and personal preference vary, and the design may not be the right match for everyone.
We genuinely value feedback like this, as it helps guide future refinements to fit and construction. Thanks again for taking the time to leave a review.
Easily the most comfortable underpants…
Easily the most comfortable underpants I ever found. Great quality and great comfortable, with excellent functionality
14 January 2026
Unprompted review
Reply from Crossfly
Thank you so much for the fantastic feedback — we’re really glad to hear these are the most comfortable underpants you’ve found.
Comfort, quality, and everyday functionality are exactly what we aim for, so it’s great to know the design is working well for you. Thanks again for taking the time to share your experience and for choosing us!
Reply from Crossfly
We take your comments on board! As a young company, we reinvest in building the brand and this includes new products, new styles and new colours. We're on it – please be patient with us!
Good
I like the product and my experience of customer service has always been good.
The “uplift” that these pants provide is great and better than others I have tried. My only criticism is that the product around the elastic waistline visually deteriorates a bit quicker than I’d like. Price point makes it a “considered” purchase.
15 January 2026
Unprompted review
I am That was easy! I am left handed so for me the Crossfly…
I am left handed so for me the Crossfly works for me. I can find my equipment easier
24 December 2025
Unprompted review
I would definitely recommend Men to order Crossfly…
I would recommend Men to order Crossfly Let me tell you of my experience.
I have placed 2 orders:
First order: 3 pack IconX 3 inch Trunk size large. Excellent fit for large. Excellent feel and comfort. Great horizontal fly great Waistband did not roll.
Second order: I ordered 3 individual Icon 3inch Trunks size large green. Excellent fit, comfort, feel However noticed waistband did roll.
I do not think there is a difference in waistband, but the Icon underwear vs IconX underwear waistband did roll.
I will order Icon X 3 inch Trunks again
Great experience. Only gave 4 star due to second order. Would give 5 star for Icon X 3 inch Trunks
14 January 2026
Unprompted review
Reply from Crossfly
Thank you so much for taking the time to share such a detailed review — we really appreciate it.
We’re thrilled to hear that the fit, comfort, and feel of the IKon X 3-inch Trunks hit the mark for you, and that the horizontal fly worked well. Your observations on the waistband differences between the orders are really helpful — we’ll definitely take this into consideration as we continue refining our products.
We’re glad your experience with IKon X was so positive and look forward to having you order again. Thanks again for your honest feedback and for recommending Crossfly!
I am not liking the waistband rolling…
I am not liking the waistband rolling down. I am not necessarily fat free but certainly have not had issues with the waistband on other brands rolling.
14 January 2026
Unprompted review
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