The Endorphin 2" Split Short features a lightweight stretch fabric, providing great moisture management and comfort to your favorite piece of running gear. Specs ? 2" Inseam (size M) ? 4-way stretch fabric ? Waterproof zippered back pocket ? Elastic waistband with drawstring ? Anti-microbial treatment to help eliminate odor ? Reflective elements ? Stretch Ultrasilk 2.0 (83% Polyester, 17% Spandex), Jersey Liner (87% Polyester, 13% Spandex), Mesh Liner