Conybio FIR Cervical Soft Collar 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. It enables good posture position and is ideally suited for frequent travelers for travel sickness. 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.