Headsweats Midcap Beanie, Black, One Size 100% Polyester Imported Performance fabric wicks away moisture to keep you cool on warm days and dry on cool days 4-Panel beanie cut fits perfectly under a bike helmet 100% Performance polyester one size fits most heads Cool performance fabric terry sweatband against your skin keeps the sweat off your face and out of your eyes Machine washable Performance fabric wicks away moisture to keep you cool on warm days and dry on cool days