New reinforced drum brake linings were installed. Early SSh-36s were made with fragile leather linings. Plastic linings are often referred to as geomembranes or flexible membrane linings. The concrete used for conduit linings was usually waterproof. It had large pistons built of aluminum and magnesium castings with steel-plated cylinder linings. Sintered-metallic linings, segmented for cooling, were again optional. Rabbit fur is popular for hats, coats, and glove linings. A recent innovation is removable soft linings, which enables them to be washed. Olefin fibre is a fibre used in activewear, linings, and warm clothing. Cisterns are distinguished from wells by their waterproof linings. Inside there are three stained glass windows which are set in ornamented marble linings. Plastic linings are also used as a method of retrofitting damaged concrete linings. Halobutyl is today the most important material for the inner linings of tubeless tires. Secondary bacterial and fungal infections are common due to the disturbance of epithelial linings. There are different systems for the cataloguing of brake linings.