Designed for a secure, comfortable fit, the Fitted Performance Cap is made from a lightweight, flexible blend of Nylon and Spandex. Its fitted construction provides a snug feel that stays comfortably in place during workouts, runs, and everyday activities. Available in two sizes: 56cm and 58cm, it offers a choice of fit to suit different head sizes. -Material Composition: 90% Nylon, 10% Spandex -Lightweight and flexible fabric