A thermal foot manikin was developed, 3D printed, and sensorized with the aim of determining the thermal insulation provided by footwear. Compared with existing thermal foot models, the manikin of the present work is cheaper, easier to set up, and simpler in its structure and components. It consists of a selective laser sintered (SLS) polyamide shell equipped with 16 digital temperature sensors and filled with water from the leg opening. The shell was designed in Rhino 3D using a Creative Commons licensed STL file selected from "thingiverse.com" website as the starting model, then printed at AIM Sweden AB. The sensors face the inner wall of the shell, thus in direct contact with the water inside.