Backyard Ice Rinks - INYOpools.com.
Sep 27, 2017 ... ... a winter cover air pillow is to protect your pool from expanding ice. ... The air pillow prevents water from pooling in the center of the cover.
Oct 24, 2018 ... This is why air pillows are often referred to as “ice compensators.” ... Air pillows are most effective when they remain in the center of the pool.