Doo Rag Pack of Motorcycle Biker Caps 3 Set Cotton Durags Bandana Head Wraps Skull Caps Pack of 3 Tribal Pattern Doo Rag Skull Caps and a Bumper Sticker by Buy Caps and Hats. Ties make these adjustable to fit many heads. Cotton fabric. One is a silver reflective, great for safety while riding on your hog, cycling, walking or running. Flap to protect neck from sun and from helmet rubbing.