This is is a poor designed cap. You have to be able to keep your forehead warm when its sub zero. The way the visor is incorporated on this cap is wrong. In order to keep your forehead warm you have to have this cap pulled down so far than you cant see anything cause of that visor. My dad always complains of headaches when its below zereo. Your forehead needs to be warm to keep rest of body warm. Not a cap for sub zero conditions!