High Quality Material: This winter swimming pool air cushion is made of thick high density PVC material. Square winterizing pool cushions are more durable, cold-resistant and reusable to protect your pool throughout the winter. Protect Pool Water: Cold outdoor weather in winter can cause pool water to freeze, and winter pool air cushions help reduce ice pressure on the pool cover. If the pool cover is supported with a winter pool pillow, it also prevents snow or rain from accumulating in the middle of the pool cover so that it does not collapse. Easier to Inflate and Empty: This winter pool air cushion has a double-sealed design that works perfectly with most pumps for faster inflation and draining without air loss; The included 15 meter rope can be easily tied to the four corners of the wintering pool cushion to make it more stable. Wide Range of Uses: Square winter swimming pool air cushions with good waterproof properties can be used not only for different sizes of swimming pools, but also with a protective shield for winter protection of outdoor furniture such as spas, swimming pools household, fountains and others. Package includes: you will receive 1 square winter swimming pool air cushion and 1 15 meter rope. This winter pool pillow keeps air leakage all season long, effectively protects your pool and meets your usage needs.