JKY Active Microfiber Stretch Boxer Brief Underwear Style 6938 Mid rise and full coverage 90% Polyester and 10% Spandex No-fly design Wicks sweat so you feel cool and dry The JKY® by Jockey Active Microfiber Stretch Boxer Brief was made to move with you all day. Plus, the fabric wicks sweat away from your skin to help you feel cool and dries fast for supreme comfort during any activity. An added perk? The antimicrobial finish helps keep you feeling fresh.