ShelterLogic Square Shade Sail, Sea Blue, 16 x 16 ft. Long life, 230 GSM, knitted polyethylene allows rain to pass through so water will not collect or pool Advanced engineered fabric blocks 90% of harmful UVA and UVB rays yet is remarkably breathable allowing air to circulate Reinforced, stitched corners with steel fittings attach quick and easy to mounting points Basic install hardware kit includes rope, bolt, attachment hardware, and turnbuckle for each corner connection ATTACHMENT POINT/POLE NOT INCLUDED