This Neerings Gliding Plastic Bench is made from recycled milk jugs & detergent bottles and carries a level of purity of over 99% HDPE. It will not deteriorate from moisture, insects, splintering, or warping. Stainless steel fasteners with a 316-grade are used in all our furniture to ensure optimum durability & we use only high-color UV stabilizing color, which minimizes material breakdown from prolonged sun & weather exposure. All these wonderful, attributes make this furniture essentially maintenance-free. It requires no waterproofing, staining, or other recurring maintenance. An occasional soap and water washing will keep this furniture lasting a lifetime! Not only is it made from recycled milk jugs, but it is recyclable itself.