All you have to do is to gently but firmly push on the exposed charging port area until the case starts sliding. These have a full covered heel and with thin socks on fit perfect. love these, nice and comfy and dont slide Im a Cushionnaires fan! Ideally Grado would have an app with an eq to tamp it down a bit. Very comfortable, quiet on wood floors, and seem much better made. The seller got back to me very quickly and was MORE than willing to work with me to make me a happy customer! (Note, the first time I put them on, I used a shoe horn because I was willing to battle it like I’ve had to testing other slippers. The noise isolation is decent. I purchased this item once I received my AirPods Max and noticed the clanking of the ear pieces.