ExOfficio Give-n-go Sport Mesh 9" Boxer Brief 92% Nylon / 8% Lycra Breathable, quick-drying ultralight mesh keeps you cool and comfortable Ergonomic fly panel is constructed from diamond-weave mesh fabric for added support Antimicrobial treatment reduces odor in fabric to keep you feeling fresh Flatlock seams and smooth waistband prevent chafing, while the travel underwear's snug fit and low-rise are ideal for high-energy activities 92% Nylon/8% Lycra Spandex. Fabric 2: 94% Nylon/6% Lycra Spandex