Additionally, balaclavas are often associated with special forces units such as the SAS, or alternately with muggers, terrorists, and activists, where they act as a form of disguise. In the UK the term IRA balaclava is often used to distinguish it from similar types of headwear.
Racing drivers may also wear balaclavas made of fire-retardant material underneath their crash helmets in order to improve protection in case of a fire following an accident, and commonly cover the nose and mouth to reduce inhalation of smoke and fumes. Dragster-racing drivers usually wear balaclavas which have just two separate eyeholes because of the increased fire risk.
AKA Ski Mask, Balaclava Helmet