PP material is also called polypropylene and is similar to PVC material. Compared to UF toilet seats, PP toilet seat is cheaper and easier to process. Also, its strength, hardness and heat resistance are better than PVC toilet seat and can be used under high temperature conditions. It has good acid and alkali resistance, and can resist organic solvents and acid and alkali corrosion. It also has good insulation, and is non-toxic and tasteless. However, this kind of material is soft, as well as not wear-resistant. it has poor scratch resistance, and ages easily, Aging is serious usually in two to three years, so we recommend you to change your PP toilet seat every 3-6 months for better use