They feel very sturdy and strong, and they feel very comfortable on my face without it moving around. But the fit is there! Soles are very comfortable compared to higher end sandals. Ordered the blue and hoping other color are still available! Its a design problem. They do not cut into your feet or your ankles ? excellent value for your dollar. *Purchased 6 Inch* If you have a high res audio source for music you can put the DAC in "High Res" mode (you will need to make sure your adapter settings in windows are at 96KHz to get max performance) This limits it to Stereo (expected) but also opens it up to using Dolby Atmos for Headphones if you have it. Switch to a laptop to see if the problem was ambient sound or mic sound - boom, it was the digital sound through the mic. That probably is because, my feet are not in the best shape and these slides are orthotic.