Air ventilated suit with inner suit

Air ventilated suit with inner suit, harness, helmet and spare helmet, as used in Royal Navy, made by Stores and Transport, from the Defence Clothing & Textiles Agency (see note)

The suit was designed for cooling engine room personnel when the ship's ventilation system is shut down, resulting in an ambient temperature +70C to 80C and 50% relative humidity, whilst performing a work rate of about 120kcal/hour for a one hour period. It is impermeable to oil and resistant to momentary contact with hot metals in the region of 150C.