Industrial covers and industrial tarps are used to protect machinery, pallets, and building materials from exposure to weather, sunlight, and other environmental conditions. Covers can consist of rigid metal sheet, a flexible textile or a semi-flexible plastic. There are many different types of products. Poly covers and poly tarps are lightweight, moisture-resistant, and relatively inexpensive. They consist of cross-woven strands of polyethylene (PE), a biodegradable thermoplastic. Products with more cross-weaves per square inch provide greater strength and durability. Canvas covers and tarps are made of closely-woven hemp, flax, or cotton cloth. They are heavier than polyethylene products, but provide better wind resistance. Vinyl covers and tarps are made of vinyl-coated polyester and often coated with flame-retardant polyvinyl chloride (PVC). Metal sheet and foil are used to form covers, wraps, shields and saddles. Mesh covers and tarps can be made of polyethylene, canvas, metal or vinyl. These industrial covers and industrial tarps allow the partial passage of wind and light, making them suitable for enclosures, site barriers, awnings, and construction sites.