Constructed of the highest quality UV resistant polyethylene and poly propylene yarns. Uses a specially designed "spine" yarn design to ensure an extremely high-density, artificial grass. Dual layer polypropylene backing sealed with a high quality rubber waterproof coating yields outstanding dimensional stability. Laboratory tested for color degradation, durability, and fire resistance. 70 oz. total weight per square yard. Designed so that the blades will stand upright with or without infill. Can be glued, seamed or stapled together. Please check out SunVilla seamless artificial turf tape by visiting : /dp/B07F5NPY87