Polymat Audio 15ft Long by 4ft Wide Polymat Blue Sub Car Woofer Speaker Box, DJ Enclosure Latex Backed Carpet and Trunk Liner Non-woven Fabric will not unravel  Extremely durable stands up to heavy use Extremely durable; stands up to heavy use Easy to cut, fit, and mold to desired shape or size. Resists stains, mold, and mildew  High resistance to gas, oil, and salt Solution dyed polypropylene for good colorfastness and UV protection