The Big D Heavy Duty Fly Sheet is made of tough, vinyl-coated polyester mesh 1000 denier woven fabric. This fly sheet repels 70% of suns ultraviolet rays and is designed to withstand fading, mildew, dirt and heavy wear and tear. Ideal for warm weather, this sheet keeps the coat clean while the horse stays cool without sweating. Recommended for stall use but suitable for stall or paddock. The Big D Heavy Duty Fly Sheet has a contoured fit, closed front, one low surcingle and leg straps.