Generative, Algorithmic and Parametric Design Heat Chair by Xiaobi Pan Heat:Chair is a chair that honors the material it uses and the human being that uses it. Made of an ultra-lightweight material, polyester, Heat:Chair bridges the digital with the analog across dimensions. On a micro level, polyester fiber consists of about 30% amorphous zone and 70% crystalline zone. Because of that, it was possible to thermo-bond the amorphous layers together to generate the gradient stiffness chair without affecting the tensile strength of the crystalline zone. On a macro level, human data was converted into the chair form as well as the material distribution in the form.