Sound quality, clarity of voices, power and price. I got these to replace my ONeill flip flops, on which the sole has reduced to almost paper thin. Dont know why Nike doesnt make a small as my daughter wears a size 6 and finds the sock a little large. My iPhone 12 charges but my apple watch SE stops charging after a couple of minutes. The rest of the shelves are for the footwear we wear often. The fit is a half size small. Overall: Solid purchase and even better price. They arent as slender as Rainbows, but for an orthotic flip flop, Im pretty pleased with the look. Even better, it is a massive improvement over my current saris model. The recipes are mouthwatering and makes you want to go to wine country.