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March Madness. FREE SHIPPING on all U.S. orders. Use code FREESHIPPING at checkout. Shop Now.
NEW ARRIVAL. Air Sport Brief. The world's first knitted cotton punch-hole fabric was developed exclusively for Jack Adams. SHOP NOW.
Comfort from the outside in. BIKINI COLLECTION. Our super-soft micromodal fabric is sustainably-sourced from beechwood trees and feels like pure heaven.
Athletic Mesh Training Short. Shop Now
Upgrade your underwear drawer.  NAKED FIT COLLECTION. Superior breathability, comfort and softness.
  • Air Army. Designed with our original horizontal fly for quick access.
  • Shop the Jack Adams premium men's New Arrivls

Men’s Athletic Underwear

At Jack Adams, we provide the modern man with men’s athletic underwear in the form of briefs, trunks, jockstraps, bikinis, thongs, and long johns. Additionally, we provide our customers with a collection of activewear including socks, swimwear, active shorts, and more! Our products feature a fantastic fit that provides comfort and flexible stretch, no matter what activity you’re engaged in. For more information on our wide selection of products, how to decide on the best men’s athletic underwear for you, and more, we invite you to use our live chat now! Become your best self and feel confident and comfortable with Jack Adams today!