Montreal Coveralls are made of a breathable fabric called Flexothane Classic, a knitted nylon base coated with polyurethane. Lightweight Flexothane Classic is 100% waterproof and windproof, highly tear resistant, and stretches 150% for even greater comfort. It also offers 100% barrier protection against bloodborne pathogens (ASTM F1671-97).
Note: The waterproof properties of Flexothane may degrade over time after prolonged exposure to some chemicals and liquids.