A warm hat to wear under a bike or ski helmet. It's made partly of flexible softshell (forehead and ears) and partly of flexible, breathable, and warm material (top and back). Softshell panels provide protection against wind and cold. The hat is insulated with fleece on the inside and has flatlock seams. It provides excellent ear coverage. insulated with fleece from the bottom windproof - flexible Softshell - panel on the forehead and ears breathable, flexible and insulated material - panel of the upper part of the hat and the back flat seams shaped for the ears perfect for a bicycle or ski helmet one size fits all 100% polyester, hand wash at 30 degrees, do not tumble dry. Hat width ~ 25 cm - before stretching Hat height ~21 cm