Men's Half MaskMaterial: Ice cloth Product size: one size, highly flexible and adjustable Head circumference: about 51 59 cm 20. 08 23. 23 inches Applicable environment: fishing, cycling, triathlon, mountain climbing, rock climbing, camping, fitness, running, etc. The high quality ice silk absorbent fabric is soft, delicate and windproof, capable of absorbing heat and sweat, keeping the skin dry, without fading and shrinking. It can be used as a wrist strap and knee