Men's Foundation Bike Boxer Brief

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A slim, padded bike boxer brief, designed to cushion under casual clothes or baggies for quick comfort wherever the day takes you.

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Strechy and compressive fabric

Elastic waistband

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The model is 5'10 with a 41" hip and is wearing a size medium.

The model is 5'10 with a 41" hip and is wearing a size medium.

Review Overview

4.835 Reviews
5 stars (30)
4 stars (4)
3 stars (1)
2 stars (0)
1 star (0)

Customer reviews

showing 1 to 10 of 35 reviews

Good product but runs small!

I'm usually a size S when it comes to everything. Based on the size chart I went with XS. Good fit around the legs and I like the padding, but after the first ride I realized they are extremely tight in front and practically unrideable for me unfortunately due to squeeze factor. If you're between sizes, size up!
Paul | May 27, 2023
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Size chart misleading, runs small

I’m a M borderline S according to the size chart, which is crazy because at 6’ 175 lbs I’m usually a M borderline L for underwear. I ordered M originally - too tight and uncomfortable. L fits well and I like them. Besides the sizing, a couple other complaints. They don’t have much of a pouch for the boys (bn3th on the other hand has a great pouch but no light liner like these). I also like when liners have some silicone or something on the hem to prevent riding up, and these don’t. They haven’t ridden up too bad but do a little bit. I’ve tried a few light liners and these are my favorite so far though.
Timmy | May 9, 2023
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The foundation brief is perfect

The foundation brief is perfect when you just want a little more moisture management and a sliver of support than you get from regular boxer brief. Nope, not a full chamois but I've found full chamois to be too much short for most of my rides. I do a lot of full day coaching with a lot of time off the bike and these are great for that.
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Michael | Oct 8, 2022
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I have been using these

I have been using these boxers for 2 to 4 hour gravel rides on our Ventana ECDM tandem. They are so comfortable I forget I'm wearing a chamois at all. Although extremely thin, the padding is comfortable and very absorbant. It reminds me of an old Mavic set I had, now sadly unavailable. I don't know how these will fair for mountain biking, but I have a feeling they'll do just fine. I find these more comfortable than the foundation shorts. Another great product from 7mesh, I shall be buying more of them in the future.
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Adam | Oct 7, 2022
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The concept of this short

The concept of this short is amazing. perfect for my after work rides or in the resort. it feels so much less bulky and hot than regular chamois, but still provides support and some comfort. Even better in the summer as it is more breathable than a regular chamois. Overall I recomend for shorter rides or lifts, on super long pedals I still wear more traditional chamois. Will be buying more!
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Sam | Oct 6, 2022
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These are a must-have for

These are a must-have for any cyclist. Took them straight out of the box to 10 days of bikepacking. If you have the proper saddle these provide as much comfort as a chamois and have a better fit and feel. These are great for a full day of Enduro racing, weeks of bikepacking and making your commute to work that much better.
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Harrison | Sep 16, 2022
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These are by far the

These are by far the best designed cycling shorts I have ever used. Padding is where it needs to be and there's no padding where it doesn't need to be. (Traditional cycling shorts include padding where men really don't need it, to my mind.) Moreover, there's not too much padding. (Whereas some cycling shorts feel like there's a whole bicycle seat sewn into them.) I do feel, however, that these are a bit on the pricey side. As well, in the the second pair I bought I heard some threads rip as I pulled them up, and I wonder about durability.
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Patrick | Sep 12, 2022
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I love these! The extra

I love these! The extra padding on the inner thighs are very comfortable. Well done!
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John | Aug 20, 2022
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These are great for short

These are great for short rides (10-20km) and definitely take the edge off without having a noticeable diaper feeling. Longer rides you may start to feel the saddle a bit but it does a great job in delaying the onset. I followed the size guide and the fit is quite tight (mostly on the front around the 'boys'), but they keep everything in place and I haven't found them uncomfortable on any of the rides I've worn these on. I would be interested in trying the next size up for a more relaxed fit.
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Ben | Aug 11, 2022
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I wear good quality bibs

I wear good quality bibs on all my road and gravel rides. But when I'm heading into town for a coffee meetup or to grab some groceries or to just ride easy with less serious riders, I will grab these every time and they truly are perfect. Especially under my Farside shorts. The lightweight boxer-like chamois design does the trick. I only wish that I had tried them long ago. I am 5'11", 35" waist and 180 lbs. I tried the medium and it would have worked but a tad too snug. The large is terrific for me.
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Mike W. | Jul 16, 2022
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Fit & Sizing

7mesh is different because we design to your dimension and articulate our gear for an on the bike fit. Check out our size guide to get the perfect fit.