4 Ft. x 5 Ft. inflatable air pillow placed under winter cover to displace rain water for easier removal and prevents expanding ice from damaging pool walls.

• Placed under winter cover to displace rain water to outer edge for easier removal
• Allows freezing water to crack inward, protecting pool walls
• Prevents ice expansion damage to pool walls
• Inflates with air
• Large 4-ft x 5-ft air pillow
• Double Chamber style with 2 leak-proof valves