I know this product is inexpensive, but it?s also a waste of money. Ive owned so many headphones and tried so many different types of tips. This product manual is spartan at best. First off, no instructions, parts list, or even a product photo was included. La parte rígida de la suela me pegaba justo en el talón y es muy incómodo. Das mag man glauben oder bleiben lassen - wichtig ist aber, dass der Schuh zum Fuß und Laufstil passt. Deberían agregarle funda I feel very comfortable in it. they have cheapened the materials by using nothing but glue holding the seams together. I ordered 3x without thinking as that is my usual size.