... 2Ne40/1,Ne40/2Composition::100%bamboo charcoal fiber,or bamboo charcoal / cotton 20%/80%,50%/50%,40%/60%Bamboo charcoal yarns with innumerable holes ... test result, with 500W halogen light shone on the bamboo charcoal yarn for 10 minutes, the yarn emits far infrared ... It has an excellent water-resistance, natural no irradiation, the best choice of warm textiles.Bamboo charcoal fiber yarns are widely ...