The likelihood of you disliking the Running Cap from Mountain Hardwear is slim-to-none! ; Cool Q ZERO provides an immediate and ongoing cooling sensation. Wick Q EVAP disperses moisture to keep it out your face. Lightweight mes sides for added ventilation. Lightweight foam visor folds up and packs down small for quick storage. Wide brim provides full face coverage from the sun. High-visibility reflective print offers security for running at night. 100% polyester. Hand wash cold. Imported. Measurements: ; Circumference: 23 in ; Brim: 2 3 4 in ; Product measurements were taken using size Large. Please note that measurements may vary by size.