This inflatable pillow is made from sturdy PVC to support and protect your pool cover during bad weather and freezing conditions. It keeps your cover of collected water and debris, is quick to center and secure, and provides buoyant protection to reduce stress on your liner. Key benefits Durable PVC construction: Thick, weatherresistant PVC holds up through seasonal exposure and provides longlasting performance. Prevents water and debris buildup: Keeps rainwater and leaves from pooling on the cover, reducing the need to remove excess water and lowering the risk of cover damage. Strong buoyancy and liner protection: The pillow's robust structure supports ice and shifting cover loads so the pool liner is less likely to be strained or punctured during freeze/thaw cycles. Easy, secure installation: Designed for simple centering in the pool; included ropes allow you to secure the pillow in place quickly and reliably. Important attributes Material: Heavyduty PVC for weather resistance and structural strength. Function: Inflatable support under pool covers to prevent sagging, pooling, and debris accumulation. Performance: Provides buoyant support that helps protect liners and cover integrity in freezing temperatures and storm conditions. Accessories: Comes with ropes for securing the pillow in the pool. Use scenarios Winter pool protection: Place the inflatable pillow under your winter cover to prevent water and ice from collecting on the cover and transferring pressure to the liner. After heavy rain or storms: Use the pillow to keep rainwater and leaves from collecting in low spots on the cover, making cover maintenance easier and reducing risk of damage. Freeze/thaw cycles: The pillow provides buoyant support that reduces liner stress when ice forms or shifts against the cover and pool edges. What you get One inflatable PVC pool pillow and accompanying ropes for secure placement. This product is intended to support pool covers and protect liners by reducing water and debris accumulation and by providing buoyant, durable support during seasonal weather and freezing conditions.