Bamboo material is good at conducting heat, which means it is a good conductor of heat. The thermal conductivity depends on the number of air holes in the material, the fewer air holes the better the thermal conductivity. Bamboo mats do not have a lot of empty spaces and can conduct heat quickly, so people feel a cold back. If you have been sleeping on a bamboo mat with a cold back for a long time and also have back pain, you should consider the possibility of lumbar myofibrosis.