Vest
Context
A sleeveless upper-body garment, typically worn over a shirt and often forming part of a suit
Explanation
A garment that covers the upper body and is usually worn over a shirt or blouse, can be part of formal attire or used for layering
Applications
He added a vest to his suit for a more formal look.
A quilted vest is popular for outdoor activities in cool weather.
Vests can vary from formal waistcoats to casual fleece or down styles.