






🔥 Elevate your essentials with the boxer briefs that keep you cool, supported, and unstoppable
SHEATH Men's Underwear 3.21 Fly Boxer Briefs combine a 5-inch inseam with an innovative dual pouch system and ultra-soft, moisture-wicking modal fabric. Designed for superior comfort, support, and durability, these boxer briefs prevent ride-up and chafing while enhancing breathability and mobility—making them the ultimate choice for everyday wear and active professionals who demand both style and function.










| ASIN | B0BPJ3FFKM |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,035) |
| Date First Available | April 10, 2018 |
| Department | mens |
| Item model number | 3.21 |
| Manufacturer | SHEATH underwear |
| Package Dimensions | 9 x 7 x 0.5 inches; 3 ounces |
B**Y
Most comfortable underwear ever!
I never do product reviews, but i have to on this one. These underwear are amazing. They are soft and very stretchy so they comfortably conform to your body. Absolutely no wedgies even when exercising. The way the pockets cradle your junk is great. Keeps the twig and berries in front of you, no more in between your thighs. Added benefit is you get a rather impressive bulge to let people know their os something doen there. My girl said they are so hot 🔥 Good confidence booster. Also no more sticki g together or to your leg. Not enough good things to say about these. I am throwing away all my other underwear and buying a buch of these. Also, if you are in between sizes even a little bit go a size down. I always wore a medium but i got smalls on these and i am glad i did. They stretch so much that the small is perfect for me.
P**N
These are the most comfortable, smartest boxer briefs I have ever worn!
These are AWESOME! I just got them, and I changed into them from my favorite brand of boxer briefs as soon as they arrived. The fit is perfect, and the inner pouch along with the other opening for your junk keeps everything separated and comfy. No binding when sitting down or stooping, and they keep the boys from sticking to your thighs. They are made of a stretchy, wicking material and feel great. The waistband so far is not doing any rollovers, and the leg openings are staying put. These are expensive, but worth every penny. I will need to have a week's worth of these on hand! STRONGLY recommend. I wish the makers would send me a complimentary pair! EDIT: Okay, I am still in love with these boxer briefs. I have now washed them at least a dozen times, and they look and feel and fit exactly the same as they did when I bought them! This means that there will not be the stretched out waistband, raggedy edges or tiny holes which form in cotton boxer briefs. I will be purchasing more Sheath underwear, but now am curious about the 4.0 version.
K**.
Happy investment.
I was hesitant on the price to dish out this much initially but am pleasantly surprised. Best dual pouch I've found so far. Really comfy, the ball pouch actually holds your nugs when other brands just give you a little extra space that can still cause your sac to get bunched up under your butt. The pouch completely hold your jewels in place with enough room for them to wander as they please. Would/will buy again. the fabric is a nice material but the only thing I would change is maybe using a bamboo material that breaths better. These breath fine but are a bit warmer compared to my less comfortable dual pouch underwear that I was wearing regularly before these. would recommend
P**D
Thank God for these!
I was hesitant to order these, as I've read many people complain online about similar products by other brands, and how they don't hold your junk in place very well. After further pondering, and many instances of getting frustrated while walking and/or jogging around, and having to stop every so often to reach my hand down my pants, and pull my junk out from in between my legs, I decided to give them a try. I couldn't be happier. They are so comfortable, and they actually perform as they claim. My junk stays comfortably in the pouch, and my hot dog stays in it's separate hole, even working it's way through on it's own when I forget to do it manually. These are a little more revealing during times of crisis (think frozen hot dog, aka: stiffy), but as long as your pants fit, I wouldn't worry. Might be a different story when wearing loose shorts to the gym or something. The only time I have noticed these not keeping my junk in the pouch is when performing any type of deep squatting movement. If I am doing squats, deep seated leg press, or anything like that where I have to bring my knees up close to my body, the jewels do fall out of the bag, but besides those instances, these are fantastic. I primarily bought them for days when I am doing a lot of walking, jogging, standing, etc., and they are perfect for that. I've already purchased a second pair, and plan to get more down the road.
A**I
Best underwear and company
I’m a big dude and have spent a lifetime chafing and trying to find the perfect briefs. I have been using this brand for years now. I refuse to buy any other brand. They are supportive, comfortable, extremely well made, and last for a long time. The shipping is super fast as well. I’ve tried legitimately no less than 9 other companies and not a single one stacks up against this brand. Lifelong customer for sure.
L**T
The best!
Finally, the perfect pair of men’s underwear. I’ve tried two other “pouch” style underwear and these put the others to shame. The Lapasas are comfortable but they lack a fly and look ridiculous. I’m not sure who the David Archys are designed for either. They ride super high on the waist and offer zero support for the boys. Plus, if you’re a “grower”, good luck getting Mr. Happy to stay in his pouch with the David Archys. The Sheaths on the other hand are perfect. The dedicated pouch for the boys work like a charm. Once “hooked” in, they stay there and Mr. Happy stays put in his separate pouch as well. And all that without sitting high on the easier as well as the benefit of a fly! That said, if your little man is a “shower”, I can see where you might have a problem keeping him from popping out of the fly on his own. These underwear have it all and it will be all I’ll buy for the foreseeable future.
T**7
Wanted to try out something new
Just trying out new things. I ordered some of these and can’t complain out the fit or the fabric. Both fit and fabric are great. Nice and soft and fits as expected. However, the overall design of this isn’t anything that I could imagine working for its intended purpose. Not only that but the pouch is somewhat of an awkward design. Also, if you have a bit more to go in the outer/front pocket then your going to have a hard time keeping your guy in there since there’s an opening to the right side of that pocket. They should have made it a horizontal fly instead of a side fly. Anyhow, the only other thing I didn’t care for is that they shipped me a color that’s different than what was shown. So, there’s that to expect I guess.
A**A
Love these
Super soft
D**L
Loved the fit of the underwear and the the feeling of good separation and sweat control after a very physical 8 hour shift
J**S
Buen diseño. Pero ... soy talla 30 , compre talla chica supuestamente para cinturas de 28 a 30... Y el boxers me quedo algo flojo.. no hace fit en mi. Antes de que me llegará el producto intenté contactarme con el vendedor dos veces , por medio de la app y por medio de servicio al cliente de amazon y en ni uno de los casos contestó. El producto hubiera sido excelente si tubieran los tamaños adecuados a las medidas que dice el boxer u ordenadas.
D**H
I saw these on a sponsor ad section on a couple of Youtube videos (one of Simon Whistler's many channels) and half-remembered it afterwards. I thought it sounded like a gimmick for selling overpriced underwear. I work some long shifts in a fairly hot environment, which gets uncomfortable. Trips to the toilet to unpeel my scrotum from my thigh and wipe the sweat off. Itchy. Not ideal. So I thought I'd give these a try, despite expecting them to be gimmicky nonsense. They're not gimmicky nonsense. They work as described. Good support (which I appreciate more as I get older and saggier) and no more sweaty scrotum. The only drawback is the price. I'd like a dozen pairs, but I balk at spending £300+ on underpants.
A**W
So pleased with these, I now have 11 pairs. Well worth the investment, and standing up well to wear and washing.
P**A
It’s good for people who have a package
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