"There aren't enough O's in smooth to describe these German Skull Caps. These caps were made to fit smooth and secure without the usual bumps and bulges like other caps. German Skull Caps are excellent worn alone or with all styles of helmets, hard hats or even other caps. Made of a cotton/nylon blend, these caps will retain their shape and smooth texture wear after wear. Color: Olive Drab. One size fits most. Unused. Price includes 3 caps."