Rampage Grey Custom vehicle cover for your 1966-1977 Ford Bronco is constructed of durable 4-layer non-woven polypropylene. This unique construction blocks harmful paint contaminants with a rugged Spun Bond outer layer. For added protection these rugged outer layers are attached to two melt blown middle layers and joined with a softer inner layer. This produces a water resistant fabric that protects vehicle finish from the elements while maintaining breath-ability to avoid temperature and moisture build-up under the cover.