2.4.2 Thermal performance requirements for anti-exposure suits

2.4.2.1 An anti-exposure suits shall:

.1 if made of material which has no inherent insulation, be marked with instructions that it must be worn in conjunction with warm clothing;
.2 be so constructed that, when worn as marked and following one jump into the water which totally submerges the wearer, the suit continues to provide sufficient thermal protection to ensure that when it is worn in calm circulating water at a temperature of 5°C, the wearer’s body core temperature does not fall at a rate of more than 1.5°C per hour, after the first 0.5 h.

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