Saucony Speed Run Cap Sonic Shell: 100% Polyester, Ventlite: 60% Polyester, 40% Nylon Imported Lightweight brim with wicking sweatband keeps you cool and comfortable Lightweight, DWR-coated front and top panels provide water resistance and breathability Laser perforated side panels and VENTLITE Mesh front and back insets let off steam as you hit your stride Front and back reflective details help keep you visible in low light Lightweight brim with wicking sweatband keeps you cool and comfortable