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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Company details
- #35 of 58 best companies in Underwear shop
- #312 of 627 best companies in Clothing Shop
- #144 of 241 best companies in Men's clothes shop
About Crossfly
Written by the company
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
Contact info
United Kingdom
- hello@crossfly.com
- crossfly.com

Bestselling styles
Replied to 100% of negative reviews
Typically replies within 1 week
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The trunks are very soft and…
The trunks are very soft and comfortable. My only complaint is that the fly opening is a little high for me.
The product is amazing
The product is amazing! the order process is easy and the size charts are clear and concise.
Simply the best most comfortable…
Simply the best most comfortable underwear!
Incredibly comfortable premium…
Incredibly comfortable premium underwear made from a soft fabric. They incorporate a fly that is actually usable because the design makes it easy to access.
I've replaced all my boxers with these, though accept they are, perhaps, a little expensive.
Just wish the waist band in the stomach…
Just wish the waist band in the stomach area would not curl over ! don’t have a wash board but just a normal stomach.

Reply from Crossfly
Generally Good quality items
Good quality items. Very comfortable to wear.
Some have lasted well others bobbled quickly.
Bit pricey for the longevity of some pairs.
Quick shipping
Quick shipping, great product, very comfortable. Not just boring underwear. Love them. Will buy more when I can.
Great products sensibly priced and…
Great products sensibly priced and maintaining a high level of quality. Not many companies can stick to that value quality dynamic but you have smashed it. Well done.
Make sure you get a size smaller.
My fault. Your Advice did say air on a smaller size. I should have done that. Even so, the waistband was too large for the stated size. Anyway, I was disappointed with the elasticity of the waistband.

Reply from Crossfly
Pouch could be deeper
Very comfortable and the fly part very useful. Only negative is sometimes using the fly, my tackle falls out of the pouch. The pouch could do with being a bit deeper.
Quick access and soft comfort
A light, fine fabric that is comfortable to wear. They hug the figure and look good.
One star deducted as they can 'ride up' when putting on jeans or trousers and also during the day.
The horizontal fly really does make life so much easier!
I'm a big fan of the underwear but...
I'm a big fan of the underwear - until the Lux range launched. The new range is a valiant attempt at improvement. Softer fabric, more premium style. But there seems to be a design flaw: the fly opening is a litte wider, but I find that the fabric behind the fly doesn't extend far enough downwards, so that there's a small patch of me showing above the fly unless I push the waistband down which results in a fit that is not as supportive as I like. I hope a minor redesign might solve this problem, but if that doesn't happen I'll be sticking with the previous style.
Edited 21/1/26 after positive reply from manufacturer, upgraded from three to four stars. I am now awaiting replacement items, and if they are as good as claimed, the review will need upgrading again, to five stars.
Edited 24/1/26 Amazing customer service - Crossfly sent me replacements which are fantastic - the best yet. My faith in the company is fully restored. Five Stars

Reply from Crossfly
Socks,
Socks,, for the first time since humans started wearing attire we finally have decent everyday socks, never mind AI never mind E=MC2 never mind The Beatles, this is quite possibly man’s greatest achievement,, decent socks, thank you the boffins at Crossfly
Great products and a great company to…
Great products and a great company to deal with.
I have been a loyal customer for about a year and I wouldn't buy any other underwear now.
Well fitting and comfortable underwear.
Well fitting and comfortable underwear.
However, the quality of the fabric could be better as it goes a bit bobbly.
Waistband tends to roll.

Reply from Crossfly
Honestly not sure if I'll order again
Honestly not sure if I'll order again. The shipping experience was the worst I've ever encountered. I'd like to try another pair, but I am VERY hesitant. It took over 2 months for my order, I was emailed that they shipped, which was incorrect, then when I received them they weren't quite as comfortable as I was expecting.

Reply from Crossfly
Great product and terrific service!
I preordered a few new colors of an existing style, so the wait was a bit longer than normal. I am a big fan of Crossfly. The underwear is comfortable, functional, stylish, and durable. My emails to Customer Service are answered promptly and thoroughly. Highly recommend!
Great product…..premium price….
Great product…..premium price….. you get what you pay for. I’m a repeat purchaser.
They are light in construction
They are light in construction but comfortable.
will wait to see how resilient they are to wear whilst working k.
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