Trusted quality and value from Alion Home brand. Our Waterproof Material is made with 160+ GSM High Density UV treated polyester. Using High Density UV treated polyester helps reduces tear and retains material strength. Coated with polyurethane and sealed seams ensures 100% rain water to run off when installed on a slope. Welded D-rings, seals off the opening gap to ensure it will not split open. Finished with a double-stitched reinforced seam and stainless-steel rings on corners for easy installation.