How It Fits Slim Fit: form-fitting through the butt and thighs. Made For The guy who wants to give his balls a boost. This best-selling style is cut from a breathable fabric that’s so soft you won’t want to take it off. Built In Tech - BallPark Pouch™, Three-D Fit™, Flat Out Seams™. Made From - Moisture-wicking viscose (95%) and elastane (5%). Measurements - 5" inseam.