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What is the difference between a standard and a Heavyweight ShelterLogic shade sail?

  • Standard sails: 140 or 160 GSM polyethylene
  • Heavyweight sails: 230 GSM knitted polyethylene that blocks 90% of harmful UVA and UVB rays, with reinforced stitched corners and steel fittings

Both let rain pass through. Both come in square and triangle shapes, in 12 ft and 16 ft sizes.