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SHEATH 4.0 Men's AirFlow Mesh Dual Pouch Boxer Briefs | Breathable Moisture Wicking Cooling Underwear Review: Soft and comfortable - Great product! It was exactly the size I ordered, and the quality is perfect. It stretches to fit my size and is very comfortable. You can feel the difference as soon as you start using it. Review: Most comfortable pair of underwear I have ever wore - I bought 2 pair a few months ago, am air flow and a regular. The Air flow has gotten rid of all chaffing problems and dries quickly after sweating. I work as a field Tech in IT and going from working up a sweat to working at a desk or driving in sweaty undies sucks. The airflow briefs eliminate all of that. The pouches keep everything separated and itch free. They also push everything a little bit forward which is nice for not feeling like I'm sitting on my boys. I ended up buying another 6 pair so that I could be wearing these every day of the week and I feel like it is well worth it for the comfort that they bring.










| ASIN | B08GZNVL94 |
| ASIN | B0GRCMC84R |
| Additional Features | Elastic Band |
| Age Range Description | Adult |
| Best Sellers Rank | #377,898 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #1,230 in Men's Boxer Briefs |
| Bottom Style | Boxer Briefs |
| Brand Name | SHEATH |
| Color | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (263) |
| Date First Available | March 5, 2026 |
| Department | mens |
| Fabric Type | Polyamide |
| Fit Type | Standard |
| Global Trade Identification Number | 00818467025944 |
| Material Type | Polyamide |
| Number of Items | 1 |
| Pattern | Solid |
| Product Care Instructions | Machine Wash |
| Rise Style | Mid |
| Size | Medium |
| Sport Type | Golf, Mixed Martial Arts |
| Style Name | Modern/Fitted |
| Style Number | 4.0 |
| Theme | Sports |
| UPC | 818467025944 |
| Unit Count | 1 Count |
M**N
Soft and comfortable
Great product! It was exactly the size I ordered, and the quality is perfect. It stretches to fit my size and is very comfortable. You can feel the difference as soon as you start using it.
S**B
Most comfortable pair of underwear I have ever wore
I bought 2 pair a few months ago, am air flow and a regular. The Air flow has gotten rid of all chaffing problems and dries quickly after sweating. I work as a field Tech in IT and going from working up a sweat to working at a desk or driving in sweaty undies sucks. The airflow briefs eliminate all of that. The pouches keep everything separated and itch free. They also push everything a little bit forward which is nice for not feeling like I'm sitting on my boys. I ended up buying another 6 pair so that I could be wearing these every day of the week and I feel like it is well worth it for the comfort that they bring.
G**Y
Pretty comfortable
Amazing
D**R
Perfection 🥰
Fits & doesn't bunch up Stays comfortable & cool 😎 Huge fan But the boys 🥜 pouch To me is worthless. Its in front Not in the middle So its worthless 🙄 but that extra material does supply additional space for your guys down there. Even if your a bit bigger down there 🍆
S**S
Too much effort.
The idea seemed nice, but it's sorta too much work. I wear them on days when I feel high maintenance ;) also having a larger package doesn't work great with the amount of space provided. I prefer Saxx for now. BN3TH is not as good, but softer than all options.
K**Y
Very breathable
These are very breathable! They're a bit tighter than the normal Sheath material because they don't stretch as much. However, they're super comfortable and keep me dry and not sticky. As someone who served, I appreciate that these were designed by a US veteran. I just wish they didn't outsource production to China, a communist country developing weapons to defeat Americans and oppress their people with the threat of slave labor in "re-education" camps.
J**M
I got them
I'm digging it 😀
J**L
The only ones to get it completely right!
I've tried every pouch type boxer under the sun and none of them were quite right. Some fixed the wrong problem (seperatec), some tried but fell short (allcitizens, shinesty). Then I finally found sheath, and they got it right! Everything is fully separated, from your thighs, from each other... it's perfect. Completely fixes all the discomforts. Don't waste your time with the either ones, these are what you're looking for! They make these in various fabrics, but this particular "airflow" option is awesome. They're a thin poly with a perf pattern. Very breathable, light weight, and fast drying. I use these under quick dry shorts when I kayak or go to the beach and I'm always dry before I get home. These also support everything in a more uplifted, up-front position. Very beneficial for cycling, although I do feel like they tend to give you slightly more bulge, which feels more noticeable in light shorts, but it might be all in my head. The price is maybe a little higher than I'd like, but that's my only complaint.
U**R
It is not worth it! Apart from being expensive and have quality issues, they refund only a fraction of the value you paid
E**E
Fine but too expensive
Trustpilot
3 weeks ago
5 days ago