A water roller ( Zurf ) is a large inflatable drum shape inflatable that allows 1-3 persons inside it to walk across the surface of a body of water. The width of this roller is 9 feet and height is also 9 feet.
PVC is Polyvinyl chloride, more correctly but unusually poly(vinyl chloride), commonly abbreviated PVC, is the third-most widely produced synthetic plastic polymer, after polyethylene and polypropylene. The working temprature is 30 degree to 45 degree. It is brittle.
TPU is Thermoplastic polyurethane, it is any of a class of polyurethane plastics with many properties, including elasticity, transparency, and resistance to oil, grease and abrasion. Working temprature for this is -30 degree to +50 degree.