Wiktionary
kidney belt
n. A wide belt sometimes worn by weight lifters, motorcyclists, manual laborers, and others who are liable to experience stress in the lower back region, for the purpose of providing lumbar support.
Wikipedia
Kidney belt
A kidney belt is a wide elastic band that is placed around the lower torso that is intended to protect a person's internal organs from damage either from strain or shock.
Kidney belts are often worn by weightlifters, and, sometimes, by manual laborers and medical patients. They are also used by motorcyclists, especially older riders, to support the lower back and guard against wind chill.
Category:Protective gear Category:Safety clothing