I have the boot after 10 months and a gestation period of approximately 4 months (about 1 time per week) complains because the heels insides had virtually dissolved, though it was the right size and could be absolutely no question of overuse. The supplier referred to the ASICS Corporation and refused compensation or remuneration. That speaks for itself. This material error in remaining at ASICS not uncommon and tempts me now but once to switch brands.