180s Men's Soft Shell Ear Warmer Diameter of muff that is made out of 100% polyester thermolite measures 3 1/2 inches by 3 1/2 inches With the shearling material inside the muff, this ear warmer will keep your ears well protected from cold elements Ear warmer is collapsible- Works with hats, helmets and glasses Hand washable. Made of 93% Polyester, 7% Spandex Suede(outside), 100% Polyester Shearling(inside) measures 3 1/2 x 3 1/2 inches Muff contains 100% Polyester Thermolite