This undershirt is designed as protective clothing for racing car drivers. It is intended to protect the wearer from heat and flames for a limited period of time and conforms to regulatory standards of safety. The textile composition is 69% Modal viscose, 28% aramid, 1% carbon fibre and 2% Elastane. It is chemically treated with x-Cool Silver treatment which provides 'an efficient reduction in body temperature and a cooling sensation enriched with an innovative anti-bacterial treatment'. Under the terms of the warranty wearers are advised that the materials are light sensitive and should not be exposed to direct light sources or sunlight for excessive periods of time. A warning is given that light may cause colour changes and start the aging process of the material.