Inflatable. Lightweight. Waterproof. 

HGU-32/P and HAU-12/P Anti-Exposure hood and mittens are to be worn in conjunction with anti-exposure coveralls as a result of emergency aircraft ditching at sea. Designed to be orally inflated and manually donned, the hood and mittens are waterproof anti-exposure garments which provide protection against hypothermia and exposure to cold water, wind, spray and rain.