[Material] Our winterizing pool pillows are constructed from durable, cold-resistant PVC, featuring a robust 0.3mm thickness. This ensures resistance to tearing from ice, even in temperatures as low as -10° F (-25° C). The design effectively prevents air leaks, safeguarding your pool throughout the winter months. [Easy to Inflate] The freeze-proof winter air cushion is designed for effortless inflation and deflation. Use a standard household air pump, inflating to about 70% capacity. This allows for ice expansion without risking damage to the pillow. Secure the inflated pillow to the center of your pool using the included string. [Protect Your Pool] This pool air cushion is essential during the cold months to alleviate pressure from ice, rain, and snow accumulation, helping to prevent potential damage to your pool walls and cover from ice expansion. [Packing Details] Each purchase includes one 4 x 4 ft Winter Pool Pillow, two repair patches for damage prevention, and a 49 ft rope for easy centering in above-ground pools. The rope can be cut to the desired length. For storage, release the air from the valve before folding. [Wide Application] Ideal for winterizing your pool and protecting it during vacations, this accessory suits various above-ground pool shapes, including round, oval, and rectangular. It helps prevent rain and snow buildup on covers that could lead to collapse. Additionally, it can be utilized for winter protection of spas, outdoor fountains, and furniture covers.