Hoagenplast lining is designed to protect the pool structure from damage caused by water, chemicals, and everyday wear and tear. It is made from a combination of materials, such as reinforced PVC or polyethylene, that provide excellent resistance to UV rays, abrasion, and punctures. The lining contains a reinforcing layer, usually made of polyester or fiberglass, which strengthens the overall structure and improves its ability to withstand pressure and stress.