The wax coating allows the cloth to be breathable and waterproof. Geox is an Italian brand of shoe and clothing manufactured with waterproof/breathable fabrics. Coolmax is marketed as "moisture-wicking" and "breathable". It is best known as the developer of waterproof, breathable Gore-Tex fabrics. However, Gore-Tex fabric is best known for its use in protective, yet breathable, rainwear. Manufacturers began to use lighter and more breathable fabrics. Adequate ventilation is essential to ensure that artists and technicians are surrounded by breathable air. This typically consists of a cycling helmet, breathable cycling shirt and cargo cycling trousers. Two air cylinders containing dry, breathable compressed air provide initial inflation. The combustion of plastic material releases toxic gases that escapes and joins breathable air. The cabin is pressurized, maintaining a sea level breathable atmosphere. It also works as a moisturizer that is lighter and more breathable than typical oils. Oxygen tanks provide up to six hours of breathable air. Various materials are used, but are usually chosen to be breathable. Lanolin is also known to form semiocclusive (breathable) films on the skin.