Lightweight, breathable cap maximum protection from the sun's rays. For aerobic or active outdoor sports in hot weather. Install on Velcro on the back of. Integrated sweat band. Ventilation system. Reflective elements. New design and very pleasant to the touch material. The materials and technology: ClimaWIND Teflon Taffeta. offering a balance between protection against wind and high permeability. Material: 100% Polyester.