Darlexx
Darlexx is a product of the Shawmut Corporation, sometimes referred to generically as darlex. It is made from two layers of Spandex fused together with a thin layer of rubber in-between.
It is an omni-directional warp knit fabric laminated to a monolithic film. It is a sports performance fabric used in gloves, boots, wet suits, ski apparel, clean rooms, and in medical applications. It was designed to keep a person "warm when the environment is cold and cool when the environment is hot".[1] Darlexx is breathable, windproof, and waterproof.
Darlexx is thicker, more constricting, and more opaque than spandex, which has led to its use in a range of fetish and bondage garments, such as hobble skirts, straitjackets, and hoods. Due to the impermeable nature of Darlexx, breathing holes are advisable when Darlexx is used in hoods.
It is also useful in applications in specialty orthopedic garments and clothing along with coverings for different seating and positioning systems on wheelchairs.