Space is wicked chilly, so you're going to need something to keep your head warm! That's where this officially licensed Cowboy Bebop Ein Peek-A-Boo Cuff Beanie comes in. This blue Cowboy Bebop cuff beanie is made from acrylic yarn and features a cute embroidered Ein peek-a-boo character design and back woven label. Hand Wash Cold / Lay Flat To Dry.