the.com/jacket

the layer that decides whether you're cold or the coolest person here

means A short coat that covers the upper body, worn for warmth or style, or by extension the outer covering of something like a book or a wire.

from From Old French 'jaquet,' a diminutive of 'jaque,' a kind of short, close-fitting peasant tunic. The 'jaque' itself is often linked to 'Jacques,' the generic French nickname for a common man (think how we say 'every Tom, Dick, and Harry') — so a jacket was, in a sense, the everyman's little coat. That said, some trace it instead to Spanish 'jaco' or to a word for chainmail; the trail gets muddy, so the 'Jacques' story, while popular and charming, is best held loosely.

origin
named after medieval peasant garment, the jacque
life saver
life jackets stay buoyant via trapped air or foam
book armor
dust jackets protect spines and sell the story
war legacy
bomber and field jackets started as military gear
straitjacket
once standard psychiatric restraint, now mostly escape acts
for instance

leather jacket — iconic garment worn by marlon brando in the wild one (1953) and james dean in rebel without a cause (1955)

flight jacket — a-2 bomber jacket worn by us pilots in world war ii, particularly famous from top gun (1986)

blazer — navy blue jacket with gold buttons originating from the hms blazer crew in the 1800s

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