Gonioa 4 x 8 ft Pool Cover Pillow for Above Ground Swimming Pools, Winterize Pool Closing Kit, Extra Thick, Ultra Strong and Cold Resistant 0.4 mm PVC Winter Pillow for Pools, Cord Included - LM8NXDP4O1

• PROTECT YOUR POOL DURING ALL WINTER: Our winter pool pillow creates surface tension which effectively protects above-ground pool walls and pool covers from pressure caused by expanding ice. This prevents expanding ice along side your pool walls. EXTRA DURABLE: If you're planning to leave this outside during the harsher winter, it must be strong enough. Our pool pillow is up to the challenge: the pool cover pillow is made of 0.4mm-thick PVC, which means that it won't leak, tear, or deflate. AIRTIGHT-DESIGNED POOL PILLOW: Double sealed valve compatible with most nozzles of electric air pumps(not including) for easy inflating. All sides and joints are well sealed and tested before shipping out, KEEP INFLATED ALL WINTER GUARANTEE. STAYING IN PLACE: Just slip the included rope through and tie the winter pillow to your pool and the reinforced grommets at 4 corners around the pillow to keep the pillow in position at the center of the swiming pool. INFLATE & DEFLATE EASIER: We chose double fold valve, which allows inflating and deflating much more faster without lossing of air. Please do not over-inflate,inflated 70-80% of its full capacity would be better for your pool and the pillow.