Bad design. I love the hook. Use these mostly for biking around by neighborhood. This is my fifth or sixth pair of Reef Brazil sandals. After two hours of charging all three devices my phone charged from 73%-83% (I can usually get a full charge in that time. Ich hatte für das Geld ehrlich gesagt nicht viel erwartet. I love how the straps help hold the slides on my feet. Gave this to my grandson to use in our small lake. I tried the hard firmware reset on the left cup, no luck. It has four different possible adjustments which is necessary while waist training.