A cowl is a piece of knitted or crocheted fabric that forms a tube-like shape, often with an opening for the head. It can be worn as a fashion accessory or used to cover and protect from cold weather.
Usage examples
The medieval knight wore a metal cowl to protect his head and neck in battle.
The mechanic put on a leather cowl before working on the car's engine to protect himself from any potential splatters.
The nun's habit included a black cowl that covered her head and shoulders.
During a storm, the sailor huddled under the cowl of the ship's smokestack to seek shelter from the rain.
The wizard's cloak had a large hood with a deep cowl that partially obscured his face.
The superhero's costume included a cowl that concealed his identity.
I like this collar detail because it gives way for a color peek through a turtleneck or a sweater with cowl neck. (creativefashionglee.com)
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Halter top with cowl neck and adjustable tie. (polyvore.com)