"The world's first digital ski coach". Excellent new condition, unfortunately my old ski racer feet made boot fitting really challenging and I have had to go without these. Only used a few times, and they are really cool. Complete kit. https://youtu.be/Ed3OOiqF-n4?si=5_nx58UO5Xuxw7QD Size D, I wear a 39 birkenstock and they fit perfect.