I just noticed they would hold cotton balls, cotton face pads, and q-tips. Solid and well-made, it also includes a couple of microphone pop-shields (should I ever need them). They also come with replacement stones just in case you lose some which is likely. Despite the comfort, after a long shift of wearing these, they apparently put an unusual amount of pressure on my ankles. Im so glad this product exists! These are my favorite water shoes ever! I did not like the fact that the package don?t come with any installation guidance and also it should say left or right because one of the pad has a small difference than the other and I figure out that it was actually for the side that has the charger port. That is not the case with these. The only other issue was that sizing stops doing half sizes after 12. The instructions might seem overwhelming if you have never done a build before but the pictures in the manual are so clear to see.