Perfect size: The faucet protector measures 24"W x 24"H - Fit up to 22" wide backflow valves system. Excellent for covering outdoor pipes, well heads, well pumps, irrigation systems, and sprinkler valves.(Given the thickness of water supply equipment, it's best to leave at least 2 inches for a better fit.) Please carefully measure your pipe size before purchase. 4 Layers Thickened Design: Outdoor faucet cover is made of 1 layers of waterproof heavy duty 420D Oxford cloth, 1 layer of cotton, 1 layer of aluminum foil,1 layer of thickened cotton insulation. Triple stitching to ensure structural integrity. High strength strap provides maximum security at the bottom, waterproof and insulated to protect against harsh winter weather such as freezing rain and snow. High-Visibility Reflective Strip: The Backflow Preventer Pipe Insulation Cover has a unique reflective strip on the cover, which can produce strong reflected light and can be quickly found, whether it is day or night. It can serve as a warning if a car passes near the faucet. Insulation & Waterproof: Our backflow preventer insulation cover can provide freeze protection as low as 3℉! It is crafted with heavy-duty material 420D Oxford fabric and thick fiber filler, The rugged outer fabric repels cold and rain, while the inner insulation layers retain heat. So even in the cold winter, It can effectively prevent your plumbing system from freezing or bursting, to keep the backflow preventer ready to go. Avoid High Repair Costs: Protects your backflow pipe systems from freezing, bursting, and blowouts due to severe weather conditions like snow, rain, wind, and exposure heating. Avoid expensive costs of valve replacement and repair every year.