Latex clothing should correctly be called rubber clothing, because latex is used to describe various substances, including the latex of the rubber tree (Hevea brasiliensis). After pre-treatment by smoking/rolling, it becomes rubber. Only through vulcanization, i.e. the introduction of sulfur and heating, is the material stabilized. This end product is then called rubber. The same term is also used for synthetic production from crude oil, since the end product is chemically identical. In general, however, one still speaks of latex clothing to make a clear distinction from car tires etc. Meanwhile, some manufacturers also use recycled latex sheets, the basic material for this is, for example, the recycling of old tires. Furthermore there are also small manufacturers who cast their latex sheets, like structural latex, also by hand. They use liquid latex, dye it and fill it into a mould up to the desired material thickness. This liquid latex usually has a low ammonia content.