Belt
From wipipedia.org

A belt is a flexible band, typically made of leather, PVC 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. Some belts are elastic for a snug fit.
Belts also have specific uses in BDSM:
- as an implement for belting, a form of flogging; often as a pervertible
- Bondage belt
- Chastity belt
- Corset belt