Polyurethane fabric, or PUL fabric, is a waterproof fabric, typically polyester, but may be cotton or a polyblend material that has been heat-laminated to a polyurethane layer. It is lightweight and extremely durable. These fabrics are used in several industries, from medical companies to the manufacture of diapers and active wear.
Polyurethane fabrics are lightweight and breathable. Typically, clothing made of this fabric is designed to hold its properties through at least 100 cycles in the washer and dryer without harm to the material. It is flexible and easy to work with and was originally designed for use in hospitals, where a reusable fabric that was strong and also waterproof was needed. Polyurethane fabrics can be manufactured in different thicknesses, depending on their intended use. For example, fabric used in diapers may be thinner than fabrics used for camping gear. Polyurethane fabrics are manufactured to feature a variety of characteristics. In situations where fuel contact is likely, the fabric can be made fire-retardant. It's also made airtight to resist water and humidity and is abrasion-resistant.