Miura Board™ is a 100% recycled, fiber-plastic composite available in 4' x 8' sheets of 1/4" (6mm) to 2" (50mm) thickness. Custom lengths are available too. It's made via a proprietary process of extruding, and laminating a mixture of "non-recyclable" (unsorted) plastic waste with natural or synthetic fibers (e.g. rice hulls, nylon carpet, etc.). Available in custom lengths, widths, and any thickness from 1/4" (6mm) to 2" (50mm)