3 Enquire Before you Buy! At 350gsm, our Blue / Beige Extra Heavy Duty Tarpaulin range is our heaviest weight poly tarp. With a tight 1616 per square inch weave count, 3% UV inhibitor and eyelets at 50cms intervals. These extra heavy duty tarpaulins are tough, durable and slightly more rigid than most other poly tarps. at 350gsm, our Heavyweight Tarpaulin range is our heaviest weight poly covering. These extra heavy duty tarps are tougher and more durable than most other coverings. Offering an economical alternative to Canvas or PVC. Although fabricated from a heavy weight polyethylene, these hardy covers remain manageable and easy to handle. Popular uses are in agriculture, marine, industry and construction. The tough spec of the tarpaulin comes from a tough 16 x 16 weave count. Backed up by weighing 270gsm per square metre. Its heavy duty nature means it is Rot proof, Shrink proof. Also protected against UV rays. With corner reinforcements and additional eyelets approximately 15 cms either side, the user can be confident in a hard-wearing product.