The aramid lining is the inner layer of a motorcycle shirt, which is made from a synthetic fibre called aramid. These fibres are characterised by high strength and resistance to puncture and heat. The most well-known trade names for aramid fibres include 'Kevlar'. In a motorbike shirt, the aramid lining performs a protective function when a person falls and then slides on the road. While the outer fabric of the shirt, such as flannel or denim, determines its appearance, it is the hidden aramid layer that prevents or significantly reduces the risk of skin abrasions. Usually this lining is placed in the most vulnerable areas such as the shoulders, elbows and back. This allows the shirt to provide protection even if it looks like a normal garment on the outside.