For the price and looks, you cant go wrong with these shoes. Amazon themselves don?t know what they?re selling. It seems a lot of others had the issue of no instructions being included. but two different sizes?. I can wirelessly charge my iPhone XR, my AirPod Pro?s AND my Apple Watch ALL AT THE SAME TIME. However I purchased a different one else where that was all one piece and it is much more functional for how many times you open and close these things. I would still get another pair of these shoes! My 2nd pair of fit flops, will no doubt order more. All of the discomfort came from the top of my head. The ankle strap is not really adjustable the way youd expect from the picture.