INTEX"s above ground pools give years of affordable fun. The liners in INTEX"s pools are made of super tough side walls comprised of three seperate layers for added strength. The two outer layers of heavty duty PVC are bonded to an inner layer of strong polyester mesh to producing the optimum blend of strength and flexibility.INTEX"s pools feature high quality galvanized steel tubing that has been powder coated for years of maintenance free use.Easy to assemble. No tools needed, the frame locks into place with high strength pins which snap into position.