A kidney warmer comes in really handy during the winter and early spring. It is a narrow band of material which sits around your midriff. It provides you with a second skin that protects your kidneys, and helps maintain body temperature. They are especially great if you work outside and you are bending and stretching a lot. They help prevent the cold from penetrating your back, which can cause it to seize up.
In Chinese Medicine the Kidney is the foundation of life. It’s where the initial spark of life comes from, so it’s worth protecting!