Marine Grade Polymer (MGP) is a form of plastic called high density polyethylene (HDPE) that was originally developed for the marine industry, such as seating on boats. It was quickly adopted for other outdoor applications including furniture, cabinets, signs and much more. MGP will not rot, swell, blister, or delaminate. MGP is a non-porous material and therefore doesn’t absorb dirt, chemicals, or any liquid (including red wine and permanent marker) making it very easy to clean. It will hold up in salt water and chlorinated environments without fading or breaking down and is significantly stronger, more scratch resistant, and durable than furniture from recycled materials.