My two pence: avoid them and spend that little bit extra on something better. It is great It may well have a practical use. The Soundcore Spirit Pro fits good with the default tips and wings out of the box, though I changed the tips to the smallest ones and the seal is perfect. All my sandals are Clarks but this style is especially comfortable and a bit more dressy for a flip flop to wear to work. I went looking for the exact same rack but was dissapointed that they dont make them that way any more. I mean it connects right away. The big flaw is that theyre tiny. They are detailed and well made. Very stable and doesn?t move.