A vest or undershirt (US) is an article of underwear worn underneath a dress shirt intended to protect them from body sweat and odors. It also makes dress shirts less transparent. The term most commonly refers to upper-body wear worn by males. It can also be worn during winter months as an extra layer of warmth.

Factory mass produced undershirts became common in the West in the early 20th century, with innovations turning the union suit into two pieces, for upper and lower body.

[edit] Types of undershirts

• A-shirt
• T-shirt

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