Rugged 16-gauge vinyl air pillow for above-ground pool absorbs freezing water’s pressure and helps protect your pool walls. The Air Pillow also reduces excess rain, snow, and leaves on your winter cover. Anchor your winter cover this year with wall bags! WALL BAGS HOLD YOUR COVER DOWN, EVEN IN HIGH WINDS! These handy wall bags help hold your cover down in high winds and protect it from wind whip and damage. Our bags are made of heavy-gauge vinyl and are easily filled with water using a garden hose. They are designed to lie on top of the cover around the inside perimeter of your pool. Rugged grommets on top of each bag allow you to fasten them to your cover’s cable. Use one wall bag every 2-3 feet. Anchor your winter cover this year with wall bags! Rugged water tubes, full 20-gauge, will not split like thinner 14- or 16-gauge bags. Up to 33% heavier than other bags. No-leak valves are easily filled with a garden hose.