Lovely chair, right? Would you like it as garden furniture? SixInch, a Belgium design firm has popularized polyurethane. Yes, you can leave this chair to the elements and simply wipe it down to clean it. There is no stitching, it's waterproof and it is comfortable. It also comes in a variety of colors. SixInch offers two formulas of polyurethane: Soft Flex for indoor use and Flex Plus for outdoor elements. High density foam and virtually any color? Sold! Photo courtesy of SixInch.