CapMat is a smart foot mat that enables user identification, supporting applications such as multi-layer authentication. CapMat leverages a large form factor capacitive sensor to capture shoe sole images. These images vary based on shoe form factors, the individual wear, and the user’s weight. In a preliminary evaluation, we were able to distinguished 15 users with an accuracy of up to 100%. This work has been submitted and accepted at the Augmented Human International Conference 2019 (AH2019) and will be presented in March this year in Reims, France.