Thoughtfully designed from concept to production, this boxer brief is our take on a modern, upgraded base layer. We've paired performance materials and purposeful design to solve the everyday frustrations presented by traditional underwear. Move through your day in boxer briefs that were designed to move with you.

Our Athletic Fit Boxer Briefs fit true to size in the waist and have the same comfort enhancing features, performance fabric and waist size as our Standard Fit Boxer Briefs. The difference between the two product lines is the Athletic Fit features larger leg openings to accommodate guys with larger thighs - for instance, a medium size Athletic Fit boxer brief will fit guys with a 23" or more thigh circumference measuring 12" down from the waistline (the area where a waistband normally sits on your hips) - see our Fit Guide for the thigh circumference fit guide for all sizes.

We created a new variant of our classic boxer briefs by replacing the underside with the same breathable performance microfiber as the rest of the boxer brief. These boxer briefs help regulate your body temperature during colder months but are breathable during warmer days.

Covered under our First Pair Guarantee


We save on shipping, you save on product - it's a win-win
  • U.S. Shipping is on the house when you order $45 or more
    • Complete Drawer Refresh - get 2 weeks' worth (14 pairs) of boxer briefs for $189 (automatically applies at check out)
    • $99 Essentials Pack - get 3 pairs of boxer briefs and 3 AirWeight Undershirts or Essential V Neck T shirts for $99 - just add them to your cart and enter code "Baselayer" at check out for undershirts or "Essentials" for t shirts
    • Eligible for the Drawer Refresh Upgrade


    • Signature Breathe Zone to regulate airflow and ventilation
    • Grip elastic on the thighs to keep the legs from riding up
    • Quick-access fly allows for a fast and more natural movement when nature calls
    • Supremely soft microfiber that is breathable and featherlight
    • Anti-odor to keep you and your gym bag fresh
    • Moisture-wicking to manage sweat during any level of activity
    • Quick-drying allows you to pack light and do laundry anywhere (hang to dry in just a few hours)
    • Blended with spandex for 360° stretch and ease of movement
    • 5.75" Inseam
    • Thick, no roll waistband stays put on your waist
    • Understated waistband with a white and textured stripe layered on top of a classic black
    • The waistband elastic has just the right amount of stretch and resistance to grip your waist without leaving marks on your skin
    • Contoured double-layered pouch confirms naturally to the shape of your goods and reduces the need to "re-adjust"
    • Mobility gusset allows for a greater range of motion and unrestricted movement
    • Major stress-points are reinforced with bar tack stitches to make sure our products last
    • Durable seams that lay flat on your skin to minimize chafing
    • Easy care - machine wash cold and hang to dry - that's it
    • Microfiber and Mesh: 90% Polyester, 10% Spandex
    • Model is 5'11" ◦ 31" waist ◦ wearing a medium
    • Fit guide


    All of our garments are easy care:

    • Machine wash cold and hang to dry - that's it
    • Do not dry clean
    • Do not bleach
    • No ironing necessary, but if desired, dampen the fabric and use a steamer or set the iron to very low heat
    Customer Reviews
    4.8 Based on 4 Reviews
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    Terry S.
    Australia Australia
    I recommend this product
    Awesome underwear

    There are now quite a few manufacturers of boxerbriefs featuring the H fly. I am a big fan of this design and have tried at least half a dozen different brands over the last couple of years. The All Citizens design is, for me, the best of the bunch for the following reasons. First, the fabric is soft, smooth, stretchy and comfortable. Secondly, the waistband gives great support without feeling overly tight. The non-ride up leg cuffs work brilliantly. And finally, the H pod is very well designed for the male anatomy. I have a dozen pairs and I am a very happy customer- great service and very well priced.

    Paul C.
    United States United States
    I recommend this product
    Big Fella Approved

    I have big old Christmas hams for thighs so I knew I had to go with the Athletic fit versus the Standard fit. Make sure you go with the Athletic fit if you have concerns about boxer briefs constricting your thighs. My Christmas hams are comfy in these boxer briefs and are not burdened by swamp *** thanks to the breathable material. #bigfellapproved

    United States United States
    I recommend this product
    Love em

    The athletic fit is the favorite pair of underwears. The regular fit was too tight and left lines on my thighs, these are more form fitting for me. They have held their form too for a long time, better than many other underwear brands that are also popular

    Colin R.
    United States United States
    I recommend this product
    Excellent quality and comfort

    My only gripe is the sizing is a little interesting. I bought two pairs, one sport and the other regular, and it comes down to the thighs. My thighs aren't that big, I measured 22 inches with pants on, so the ones that are 22 inches, they're tight but the waist feels right. The others that are 23 inches fit the thighs fine but the waist is a little smaller. I wear medium in every pair of everything haha. If it wasn't for that they'd be the perfect pair of underwear so just be really aware of your measurements.