Protective trousers, for shipboard firefighting (suit type Bristol HS 2/3), designed for use on board ship, by Bristol Uniforms Limited, Bristol, England, 1981. Designed to follow the SOLAS Regulations of 1974 (Safety of Life at Sea) that required vessels to carry specialised safety equipment. Two-piece suit made of Heatshield cloth, a textile that retains its structure in flames up to 1000°C, protecting from intense radiant heat, (though not from flames), and limited protection against cold, most acids, oils and other chemicals. The wrists and ankles are elasticated to avoid exposure to radiant heat. Trousers made of modacrylic beta-glass fibre yarn mixture cloth, lined with non-flammable twill.