... bamboo charcoalOMEWelcome:can make as per customer's specific material and sizeUsageCan be used for rest, sleeping, therapy, etc ... ,plus far infrared ray and negative ions to promote sleep, improve blood circulation and metabolism, ease nervous, and relieve uneasiness of ... stiffness,headache,migraine,headache, migraine, asthma, insomnia, and nose allergy can be improved.2.This health bamboo charcoal ...