A sleeveless or short-sleeved tunic or jacket worn under armor in the medieval period, also spelled 'jupon' or 'gipon'.
From Old French 'jupon,' possibly from Arabic 'jubba' (a type of garment). The word traveled through multiple languages as the garment itself became known across Europe through medieval trade and warfare.
Knights didn't just throw on armor—a gipon underneath protected them from bruises and rubbing, making it one of medieval fashion's most practical inventions, yet few people today have ever heard of it!
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