1 Bluetooth I initially ordered these slippers, and got a message from the seller that they found a hole in one of them, and it was the last pair in stock. That lack of holes on the side also caused my feet to sweat. I think I have found the perfect headphones to use all day long. There was one screw hole missing from the top rack, but not a big deal. Super easy to install, sturdy, doesn?t move, good price point, easier to grab the phone off of than the water bottle holders, and leaves that space for another bottle, a remote, etc. Very inspiring book. If you decide to buy, follow the size chart that you find by scrolling down. After transferring all my data I went to get a new SIM card. Very comfortable and good walking sandal to wear with casual clothes and sundresses.