Our Rectangle Shade Sail, made of High Density Polyethylene fabric and mesh woven shape, is water and air permeable as well as UV block, which can both keep breeze through and protect you from sun burns, allowing you to keep cool and enjoy pleasant natural lighting in hot summer! With reinforced stitched seam in corners and a double-stacked design on edges, the shade sail is powerful and tear resistant. Suitable for holding outdoor activities with effective shading in summer.