SHANS New Design 90% UV Shade Sail DIY With Clips Free (Green and white 12ft x 40ft) SHANS Third Generation Products. Knitted Shade Cloth Manufactured of 100% New High Density Polyethylene + UV stabilized. Edge-Thickening More Firmness Will not Fade, Crack or Rot, Longer Useful Life. 165 GSM Protects with up to 90% UV block. To ensure 100% satisfaction, customers are more than welcome to compare the quality of our products with that of other brands on the market.