A cagoule is a thin, hooded outer jacket usually windproof and rain proof, and worn by walkers and designed to be worn as one of a series of layers of clothing, and be light enough to pack away into a small package when not worn. Research Cagoule
A chemise cagoule was a heavy night shirt worn by Catholic men during the Middle Ages to ensure they didn't derive any more sexual pleasure than was essential during intercourse. The chemise cagoule had a hole cut in the front to allow the wearer to access his partner, but was otherwise an article of chastity. Research Chemise Cagoule
 
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