12'(3.66m)_x000D_• Can increase water temperature by 8 degrees Fahrenheit_x000D_• Allows sun’s rays to penetrate without heat escaping_x000D_• Keeps out leaves, debris, dirt & insects_x000D_• Easy-to-use adjustable drawstring with lock button_x000D_• Simply spread over the pool water and pull to lock_x000D_• Durable, puncture-resistant materials_x000D_• Fits Summer Waves® Quick Set® Ring Pools & Frame Pools