Tear resistant. 4 mil +/- 1 mil. Waterproof, rustproof grommets. Light weight. Will not mildew. Crack resistant to -20 F. Stronger than canvas. Will not tear or shrink. Washable. Grommets are placed every 3'. Reinforced corners rope inside hem for extra strength. Great for use as construction site cover, rain canopy, boat covers, tents, patio furniture cover and much more. Reversible green/brown color blends with the scenery and surroundings.