... smell,keep Back comfortable,promote blood circulation Bamboo Fiber and Spong Charcoal Back Cushion, Bamboo Sea Charcoal Carbon Back Cushion made of ... Charcoal Fiber,good to Back Pain,Back Ache, ... conditions such as back pain,body ache,and fatigue.BAMBOO SEA Bamboo Charcoal/Carbon Bakc Cushion Are designed to meet these ...