Sun Shade Sail Canopy The sun shade sail is made of 185 gsm UV protected high density polyethylene (100%HDPE) shade fabric with strong stitched seam. Widely used for a patio, Lawn, garden, pool, bbq areas,pond, Deck, courtyard, backyard, dooryard, park, carport, pergola, sandbox, driveway or other outdoor occasions. Courtyard Pool Lawn Garden Read more Measurement: Measured from corner to corner, the edges are relatively neat to help the shade sail fit tightly and neatly and prevent the shade sail from sagging in the middle for best appearance and performance.