The demands of non-structural firefighting situations such as urban search and rescue - and the specialised skills needed - have led to the design of garments specifically for those situations. These garments are designed to be used in confined spaces, but are equally adaptable for other technical rescue situations such as road traffic accidents. MSA Bristol USAR garments incorporate two layers – a flame retardant outer layer and a waterproof membrane - and are used widely both in the UK and overseas. In addition, the coat and trouser ensemble can be zipped together to form a one piece garment when needed. As it will potentially be used to rescue casualties, it features a two-layer construction incorporating a pathogen barrier.