Wenn mansie vorher etwas klein knetet gehen sie in den Ohren auf und passen sich perfekt an und dichten nach außen ab. Ive noticed after running hard and sweating on the treadmill they tend to work themselves out of the ear canal a bit. These sound really nice and detailed, works really well for low and medium volume listening. It?s still working great. My computer is next to my backyard window and when my dogs are outside barking, they can be heard. Conclusion: Be prepared to return the shoes for another size. I?ve been looking for ways to store our bathroom essentials more efficiently and this rack is beyond perfect. Almost any cheap Bluetooth buds will beat these. Nice slipper - runs a little short and a little narrow, but I could still wear it. They are sturdy, simple to install & have that industrial & for me the farmhouse look.