This lightweight and stretchy cap fits snugly. Its fabric transfers moisture and dries fast when needed. - Main material: 96% polyester and 4% elastane - Sweatband made of 100% polyester - Reflective print - S/M = 53 - 57cm - L/XL = 57 - 61cm Originally known for its versatile tubular scarves, Buff has expanded its range to include headwear as well. These hats also offer excellent comfort, style, and quality! The factory holds the ISO 14001 environmental certification, as well as the SGE 21 certification for ethical and social responsibility. The electricity used in production is generated from renewable natural resources.