Just like taking a breath, Breathing is a chair that can elastically transform and vividly provide the full support for people to sit on. When the user sits on the chair, the edges of the chair automatically become the armrest; also, when the user stands up from the chair, the chair returns to the original shape of a cube. The changing of shape is resulted from the weight of the user, the texture of the material and the interlaced structure, instead of using any mechanism.