The Big D Heavy Duty Fly sheet is made of tough, vinyl coated polyester mesh 1000 denier woven fabric perfect for turn out purposes! This fly sheet repels 70% of the suns ultra violet rays and is designed to withstand fading, mildew, dirt and heavy wear and tear. The heavy duty fly sheet has a contoured fit, twin buckle and grommet open front closure, one low surcingle and leg straps.