Function and protection: Keeps your pool safe during the offseason by placing the inflatable pillow at the center under the cover to prevent water buildup and leaf accumulation, protecting the pool structure and cleanliness. Size options to fit your setup: Two round pillow sizes available 120*120 cm with three thickness options: 0.18 mm, 0.27 mm, 0.30 mm, and optional ropes 150*150 cm with 0.18 mm thickness Durable material: Made from resilient PVC that withstands low winter temperatures without hardening or cracking, delivering dependable performance year after year for seasonal pool maintenance. Easy inflation and storage: Lightweight and portable, this pillow inflates quickly with a standard pump, enabling simple setup and effortless storage when not in use. Suitable for home and garden pool care. Practical use scenarios: Offseason protection: Place under the pool cover to prevent water pooling and leaf buildup for both inground and aboveground pools. Seasonal maintenance: Use to keep the cover clean and the pool area tidy during seasonal transitions. Flexible compatibility: Choose the 120*120 cm or 150*150 cm option to fit different pool setups and cover sizes.