A warm hat to wear under a bicycle helmet. It has a windproof front panel. The back of the hat is made of breathable and warm material. It extends to cover the ears and neck. -insulated -additional inner mesh lining -airy back panels -panel on the forehead provides protection against wind and cold -rigid visor -shaped to fit the ears, it perfectly protects them from the cold -universal size -85% Nylon / 15% Spandex, hand wash at 30 degrees, do not spin. Hat width ~ 26 cm - before stretching Cap height ~20-23 cm depending on the location