NEOPRENE is a synthetic rubber material designed to be resilient, flexible, durable and very resistant to failure and/or breakdown by water and compression. Air and water become isolated in it’s unique molecular structure. For instance, you can find neoprene commonly in oven mitts because of its high heat resistance and high temperature stability. Neoprene should not be used in long sunlight exposure applications. This product comes in 7 ft lengths for your convenience- put 7 in the quantity.