Features: Material Description High density polyethylene hollow blow molding plastic seat and backrest Chair material: HDPE (with new material blow molding) HDPE is a highly crystalline, non-polar thermoplastic resin. The original HDPE has a milky white appearance and a semi-transparent shape in a slightly thin section. The high-density polyethylene is a non-toxic, odorless, odorless granule. Additional materials such as anti-UV, oxidant, etc. can be added. The product performance is strong against impact, strong UV resistance, long life, warm in winter and cool in summer, and has good heat resistance. According to ergonomic design, the seat and backrest is comfortable and hollow.