Fleece Ear warming head band for use under helmet, with optional button to secure face mask. Outer color: Black Inner color: Gray (Note, the colors may look different in person, depending on your monitor.) These ear warming head bands allow you to keep your ears warm, while you use a helmet. These were designed for use during winter equestrian activities while using a helmet but would work for bike helmets or any others that don't cover your ears. The design of the head band uses elastic that is secured to the head band, so that the elastic goes underneath your helmet instead of bulky material, allowing your helmet to remain fitting as though you didn't have anything under the helmet. See other listings for other colors. Please choose the color of the elastic, and if you would like me to add buttons for masks (required options). The button is helpful if you are wearing your helmet, ear covers and a mask. In order to put the mask on or take it off, you have to unfasten your helmet and lift your headband - this button allows you to put your mask on or take it off without undoing everything. These headbands are made from fleece, with 5/8 - 1 inch elastic that goes under your helmet.