A heavy duty premium poly tarp features a 12 x 14 mesh count, this tarp is 12 mils thick and 6 ounces per square yard. Aluminum grommets are spaced about 18 inches apart, providing plenty of tie downs. Waterproof and rotproof, this quality tarp also gives 100 percent protection from the sun’s damaging UV rays. Reinforced corners and rope-reinforced edges add to its durability.