U.S. Pool Supply Ground Shield 12-Foot x 24-Foot Rectangle Heavy Duty Pool Liner Pad for Above Ground Swimming Pools - Protects Pool Liner, Prevents Punctures, Eco-Friendly Fabric - Extends Liner LifeBrand: U. S. Pool Supply Color: Black Features: Ground Shield Protects Your Pool Liner: This 12 foot x 24 foot rectangle, heavy duty, extra thick pool liner pad safeguards your above ground pool liner from punctures, tears, abrasions, and rips caused by rocks, roots, glass, and other sharp objects. It extends the liner's lifespan and reduces the risk of damage and costly replacements. The pad also provides a thin layer of cushioning underfoot, making