Constructed from tough, coated nylon, the 20-inch Protective Sleeve will shield your Gorilla Bands from damage. The tough nylon exterior, combined with the ultra-durable neoprene liner, helps protect your Gorilla Bands from damage due rough surfaces and sharp objects. It also helps disperses pressure on your body during high tension movements. The Protective Sleeve has an added benefit for those that like to use multiple bands on their Gorilla Bow at once. It conveniently collects and keeps your Gorilla Bands together during exercises.