100% recycled high density polyethylene (HDPE). Material is non-porous and will not collect dirt internally. All HDPE material is colored with pigments that are added during the process of extruding the sheet. Colors are not a surface application but are consistent all the way through the material. All material has a UV package added with the pigment to reduce the affects of the sun and help to deter fading. White, black and darker colors resist fading more than lighter colors. The high density polyethylene timber is flexible and comfortable without cushions. Simply wipe clean with soap and water. This item is an all season product that can be left outdoors year round.