Easiest set up on the market, robust and durable 100% PVC heavy duty vinyl walls and thick floor, quick drain valve and puncture repair kit included.The Hillington Prompt Set Pools are self-supporting swimming pools with no complicated construction or tubular frames - just inflate the top ring of the two, and the pool is ready to be filled with water.As the water fills, the upper ring will float on the water forming the rigid sides in approx 30 minutes.The universal inflation valve is compatible with a wide range of off-the-shelf pumps, electric, foot or hand.