Under a helmet or out there on its own, the wind- and water- resistant Sugoi Firewall Skull Cap will keep your head dry and comfortable when the temps dip. Product FeaturesMaterial: Firewall 320 polyester, DWR coatingAdjustability: elastic panelSPF Rating: UPF Rating: Recommended Use: riding in cold weather, insulating your helmetManufacturer Warranty: 30 days