This is my 3rd pair because of how often I wear them. The slanted part has a little ledge that holds the phone securely - even when its set to vibrate. I charged the case once so far and still have 50 % battery life. item was bought as Christmas present for 14 yr. These slippers are a bit more expensive, but worth the cost. Im now satisfied. I ordered them in my usual size, 9. for reference I am 5"6 and am now weighing 175. The welds are crap. That joy and laughter was worth the price!