This is a type of heel grip, such as for pumps. It seems to be made of a silicone-like material and designed to put less stress on the heel. I will take it out of the box and wrap it securely for shipping, but if you would like the box, it can be shipped for an additional ¥350, so please let me know. It is new and unused, but it has been stored, so I am selling it at a low price. Thank you for your understanding.