Belt

From Wipipedia

A belt is a flexible band, typically made of leather or heavy cloth, and often worn around the waist to support trousers or a skirt, or to give shape to a dress or coat, and it serves for style and decoration.

Belts also have specific uses in BDSM:

• as an implement for belting, a form of flogging; often as a pervertible
• Bondage belt
• Chastity belt