RGJ 15 Ft Pool Liner Pad for Round Above Ground Pools, Thickened Pool Mat Tarp for Under Pool, Dual-Color Pool Ground Pad Cloth Floor Mat for Pool Bottom, Puncture Protection & Extend Liner LifeBrand: RGJ Color: Round Features: THICKENED WATERPROOF PE MATERIAL: Our pool liner is made of thickened PE material, which is strong and wear resistant, waterproof, sun proof and puncture proof. It effectively avoids collision and friction between the bottom of the pool and the ground, and prevents the pool from being pierced by stones, roots, nuts and grass on the ground, thereby extending the service life of the pool DUAL COLOR DESIGN: Our pool mat