Product Name: Helmet Full Face Inner Mask Material: COOLMAX Quick Drying Mesh Cloth Product Weight: 1.2 oz Package Size: 17 x 13.5 x 2 cm Size: L: 55-59 cm XL: 60-62 cm Color: Black; Gender: Unisex How to measure your head circumference: First use a standing or sitting position. The tape sticks to the scalp, measure twice from the front hairline to the back bump and take the medium value and refer to the size above.