VICAMB 15ft Heavy Duty Round Pool Liner Pad for Above Ground Pool,Pool Ground Mat Under Pool Pad,Pool Bottom Liner Protector to Prevent Puncture and Extend Liner LifeBrand: VICAMB Color: Black Features: Heavy duty felt material: This swimming pool liner pad is made of 6. 5oz yd felt fabric, which is more durable, and sturdy, and ensures that the bottom of the swimming pool does not wear or tear easily, providing a longer lifespan for your liner Swimming pool liner pad: This round pool ground mat provides an extra layer of protection for swimming pools, preventing collision and friction between the pool and the