Alion Home Waterproof Woven Sun Shade Sail - Forest Green (9 ft 10" Triangular) Waterproof fabric is constructed of high density polyester with UV-stabilized fabric. Sun shade is finished with strong stitched seam and durable stainless steel D ring on each corner. Protect against up to 95% harmful UV rays, and make your patio/pool safe, privacy and cool. Combine multiple shades in different sizes and colors for a unique and artistic look. Ideal for backyards, patios, decks, gathering areas, pools, gardens or anywhere you need a bit of shade and privacy.