OCHACO™ White Bamboo Charcoal Yarn or fiber in the Far-infrared (FIR) light spectrum has a wavelength of 4 to 14 microns. This wavelength range is also known as "the light of life" because it is the same light wavelength as held by a number of living organisms.

When incorporated into the construction of garments, a beneficial thermal effect is created that assists to keep the body warm and promote improved blood circulation. Can be applied to many types of clothing accessories such as caps, socks and gloves, and more.