Add a 100% custom-made insole that perfectly fits every type of runners. Math Sport shoes were designed with a vibram insoles to respect the biomechanics of a natural foot. The toe box has no stitches, the upper is made with a mesh to allow for breathability. An incomparable comfort that will offer you your best race so far! Call our store at 450-736-1818 to make an appointment to build your own running shoe! We'll take your measurement, make you try our samples for the right fitting and we'll send your order to YUL RUN !