A men's sports boxer from BJÖRN BORG perfect for training. SPORTS MICROFIBER BOXER 3p offers comfort. Björn Borg Sports Boxer 3p offers optimal comfort and functionality for active men. Made from soft, recycled polyester with stretch, they provide a perfect fit and medium leg length. The smooth seams and the elastic microfiber waistband minimize chafing and maximize comfort. Moisture-wicking properties keep you dry during workouts.