Features: 1. Premium Quality: Made of aluminum foil, PP cotton and waterproof 600D oxford cloth, it has excellent insulation and water resistance. Easily adapt to the sun, snow and rain and other harsh conditions, to provide all-weather protection for your valve. 2. Anti-freeze Protection: The additional insulating aluminum layer greatly improves the anti-freeze performances, even in the cold winter, will prevent your plumbing system from freezing or bursting, saving you expensive maintenance costs. 3. Stable: The widened hook and loop seal ensures a firm adhesive force. Even in strong winds, you don't have to worry about it blowing away. 4. Optional: 43 x 52cm, 62 x 63cm, 63 x 77cm optional, to meet your different needs. 5. Measure Before Purchase: Given the thickness of the return valve, it is best to leave at least 3 inches for a good fit. Specification: Material: 600D Oxford Cloth Product Color: Beiges, Black Product Size: 43 x 52cm, 62 x 63cm, 63 x 77cm Product Weight: 250g, 400g, 450g Package Included: 1 x Outdoor Backflow Preventer Insulation Cover