Features 1. Protect the Pool: Our 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. 2. High Quality Materials: This round and square above ground pool pillow is made of thick cold resistant PVC material. The edge of the pool pillow is designed with a double seal, making it less likely to leak or be torn by ice. It is specially designed for cold weather in winter and will be a great companion for your pool. 3. Airtight Pool Pillow: Double sealed valve compatible with most nozzles of electric air pumps for easy inflating. Perfect for closing both your overgroud and inground pool for all winter. 4. Easy to Use: This inflatable above ground pool pillow is very easy to use, just use the electric air pump that is commonly used in the family to quickly inflate. Then tie the ropes to the four holes on the edge of the pool pillow and fix it in the center of the pool. Simple and fast, you can install in ten minutes. 5. Wide Application: Our winterizing air pool pillows can be used for all above ground pools to avoid damage to outdoor facilities due to rain, snow and leaf accumulation, and help keep your outdoor pool clean. Specification Material: PVC Color: Blue Size: 113 x 113 cm Weight: 400 g Pattern: Round, Square Package Include: 1 Pool Pillow