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Air jacket

noun

Noun

1
A lifejacket.
"AIR-JACKET. A leathern garment furnished with inflated bladders, to buoy the wearer up in the water."
2
an inflatable life jacket wordnet
3
An inflatable vest worn to cushion falls.
"1765, George Alexander Stevens, The Celebrated Lecture on Heads, London: R. Richards, Part 3, p. 16, […] our army all should wear a new uniform; all our horse infantry should wear air jackets, and all our foot cavalry should wear cork waistcoats; and then ye know why they’d be all over the sea before you could say Jack Robinson."
4
An enclosed space containing nothing but air that surrounds something in order to provide insulation.
"In the first Daimler gasoline engines a current of air was forced through an air jacket surrounding the cylinder by means of a rotary fan mounted on the crank shaft."

Unscramble this word: airjacket