Light gray nylon belt with plastic buckle. Measures 51 inches, end to end and 1.5 inches top to bottom. The hidden compartment spans 21 inches in the back of the belt. The tag claims that the belt is airport safe due to it's non-metal construction. The plastic buckle makes it safe for people with an allergy to nickel. Travel with cash or small valuables with more security than keeping them in your pocket. I've never heard of a robber wanting to check the back of someone's belt.