Product Description TPU Filament Thermoplastic Polyurethane (TPU) is a flexible plastic that retains its shape and form. It is a bendable yet strong and durable plastic that draws comparisons to rubber. TPU filament is semi-transparent as well as very elastic. TPU plastic is also very resistant to oils and grease but must be kept away from solvents acids and fuels. Cleaning a printed part is easy and can be accomplished with mild soap. There are many everyday uses for TPU as a plastic. TPU plastic is used in car parts to power tools and medical devices. TPU is also very popular in protective cases for mobile phones and tablets due to its high flexibility.