Falken Design Twin Wall Polycarbonate sheet is a multi-wall Polycarbonate sheeting that features at least a twin wall structure with interconnected channels that create small pockets of airspace in between them that enhance the strength of the polycarbonate and reduce the impact of thermal transfer. These pockets of air provide additional insulation in the space and can reduce energy costs. Clear Twin Wall Polycarbonate Sheet commonly is used for canopies and other small building structures. Lighter than solid polycarbonate, acrylic or glass, twin wall polycarbonate sheet is the perfect material for greenhouses, as well as roofing material, wall cladding, golf cart windshields and POP displays for merchandising. This tough material lasts for a very long time and blocks the sun's UV rays.