I was on a steep incline going downhill where I previously basically slid down in my nikes. being barefoot. The sound quality is nowhere near the ones I bought last year. Also, if your phone does rapid charging, like Qualcomm Quick Charge (QC) or the Qi standard, then be sure to use a USB power adapter that supports that use. I lost my Apple case. 💖 They are gorgeous like the picture and I am so in love! At first, I was confused by the one sheet of instructions and the vague dotted lines for folding, mentions of snapping parts together, etc. no stretch to them got a size medium and they wouldnt even fit my 13 year old that is 85lbs mp4, as I could not really distinguish any improvement in sound quality with higher bitrates up to 320kbps, or even lossless encoding straight from a cd. I bought these sandals through Amazon.