Conybio FIR Wrist Band is specially designed with high density Bio-Ceramic & Negative Ions using the State of Art "Nano Technology". The quality of the Fabric has been improvised by the usage of this Technology to enhance the warm and wellness feeling. Provides additional support for the wrist joint and its suitable for sportsmen. Washing method: Hand wash using mild detergent. Do not scrub with a brush or use harsh methods of cleaning. Do not squeeze - only drip dry.