Eliminate damage to your winter cover due to high winds. This is a simple solution to preventing wind from getting under your winter cover and causing damage and premature wear and tear. Unique blend of tough poly film that wraps around your pool to seal out winter gusts. Material stretches and holds tightly over a long period of time, even during extreme cold weather. Creates an airtight seal, your pool water will be crystal clear next spring. You can expect a longer life from your winter cover.