95% UV Blockage and permeable fabric, Temperature underneath is gradually reduced during use & simultaneously feel a light breeze below the shade sail. This is NOT waterproof: water can come thru freely and won’t add weight to the shade. Our shade sails are made from 185 GSM 100% Non-recycled HDPE material, includes 304 Stainless Steel D-rings stitched seamlessly into its corners & comes with nylon ropes for convenient installation. Measurement is taken from D ring to D ring, leave 1 - 1.5 foot space for the hardware kit between D ring on the shade sail and its mounting points, all edges are finished slightly curved, so that it can be stretched tightly to prevent sagging from the middle. Custom sizes available, we offer multiple sizes and colors for your convenience, feel free to contact us if you have any special requests for order. Easy to set up and remove, perfect for patio covers, pergola, lawn, garden, driveway, swimming pool, park, child's playground, etc. Triangle