55% cotton and 45% linen to give it a slightly rugged Safari appearance while remaining soft and comfortable. No refrigeration necessary. Blubandoos are reusable and hand-washable time and time again.
Safari Hatbandoos are oversized to allow for the crystals to swell. By leaving it in water a little more or a little less you can adjust the swelling of the band thus adjust the size. Size small/medium usually fits approximately size 7 to 7-1/4 hat size and size large/extra large usually fits approximately size 7-3/8 to 7-5/8 hat size.