Material:
Look for durable materials like vinyl, polyethylene, or canvas, known for
their strength, tear resistance, and varying degrees of weatherproofing
abilities.

Thickness
(Polyethylene): Polyethylene tarps are typically classified by their
thickness in mils, with thicker tarps offering greater durability. A good
starting point for a heavy-duty poly tarp is 12 mils or thicker.

Weight
(Vinyl): Vinyl tarps are often classified by their weight per square
yard (oz/sq yd). The heavier the vinyl, the denser and stronger it is.
Look for weights starting at 18 oz/sq yd for heavy-duty applications.

Construction:
Reinforced hems, corners, and rust-resistant grommets ensure that your
tarp can withstand heavy winds and frequent use.

Additional
Features: Some heavy-duty tarps offer extra protection against UV
rays, fire, or mildew, depending on your specific needs.