| 摘要 |
An embodiment of the present invention discloses a mattress including an underlayer, an air chamber layer arranged above the underlayer, granular material incorporated in the air chamber layer, and adjusting devices for adjusting the amount of air in the air chamber layer between a rest position, wherein the granular material at least almost fills the whole air chamber layer, and an adjusting position wherein the air chamber layer is only partially filled with granular material. |
