Camouflage Hats with Chin Strap, Outdoor Gear & Sun Protection 60% Cotton/40% Polyester Snap closure Spot wash soiled areas, Dry on medium or air dry Hat Sizes: 22.5 inches / 57cm (Men's Medium). The Mesh Hat is 21.75 inches / 55 cm (Men's Small and Youth's XL) Chin strap keeps the hat from flying away in windy conditions Air vents on sides of hat to keep you cooler Folds up for easy carrying and storage Lightweight, Provides sun protection