12 oz treated canvas on top, which is water repellent, UV and mold resistant
Can be secured with S-Hooks sewn to 1" wide elastics fastened to cotton webbing loops sewn on the other side of the blanket, providing a tight fit around the pipe
Layer of 1” fiberglass insulation between the glass cloth and canvas
Made of glass cloth on the underside with a temperature limit up to 1000°F (537°C)