When the HRC method is used the arc flash warning label is to include the highest hazard/risk category (HRC) for the equipment. Items 130.5(C)(1)a through c do not apply. They are only applicable when the incident energy (calculation) method is used.
Wool s natural ability to absorb and transmit water vapor is of unique importance in maintaining Thermophysiological Comfort, a state in which the individual is free from thermal strain. The Humanitarian Blanket provides the necessary requirements for emergency and humanitarian relief situations.
Water is a good conductor if heat and hot foods give off lots of water vapor so a waterproof envelope is important to keep the insulating fibers full of air from absorbing water and loosing their insulating qualities. Try touching a hot pot with a wet oven mitt on to experience the effect first hand :).