Specially designed for extreme temperature fluctuations found in greenhouses, it resists expansion and contraction better than regular poly. It is waterproof, rot and mildew resistant, and has outstanding puncture, pinhole and tear resistance. Extra tough 11 mil – thickness Triple layered laminate with UV stabilizers to extend its life 85-90% transmittance of clear glass Translucent woven properties diffuse and scatter light in all directions Resists yellowing With proper care, it should last 3-4 years or more, even with heavy sun, if properly ventilated. On well ventilated structures, especially in cloudy or shady areas many get 7-10 years of use. We will gladly send you a sample upon request. Sized to order by the length of your choice. Price includes delivery (except to HI and AK), up to 3300 sq ft. Allow 2 weeks. Due to custom cutting, we can not accept returns.