When it's time to replace your above-ground pool liner, this 20-gauge blue swirl-bottom overlap liner is the perfect choice to keep your pool looking pristine season after season. The bright blue color will make your pool look refreshing and inviting, while also covering up any potential wear and tear. The liner simply goes up and over the top edge of your pool wall and hangs down on the outside. The 20-gauge vinyl is strong and durable enough to withstand winter weather. And because this 15-foot-by-30-foot oval pool liner features overlap-style hems that are reinforced for strength, it's designed to last.