Saucony Men's Speed of Lite Shorts Stretch Ultrasilk: 86% Polyester, 14% Spandex, Ventlite + X-Static Xt2: 87% Nylon, 7% Polyester Xt2, 6% Lycra Imported Hidden back zippered storage pocket keeps your essentials secure, plus two stash pockets at hips hold extra fuel to go the distance