New Balance Mens Trinamic Nb Flex Boxer Brief 42% Nylon/42% Polyester/16% Elastane Imported Advanced 3D adaptive fit with superior stretch and recovery. Body hugging without the pinch Proprietary fabric moves moisture rapidly to dry quickly and offers antimicrobial properties to resist odors Wide ergonomic waistband with Plush Raised spots designed to facilitate moisture movement No-ride up, 6 inch inseam with supportive no-fly pouch Minimal seams and tag less for comfort