Keen products are excellent. Before purchasing, I noticed reviews stating the holes didnt match up for assembly. 5 C/D because I have knobby toes from arthritis and need the extra width. A week after purchasing audio cuts in and out. Good noise cancellationVery good quality to hear musicI guess its slightly pricey. The material is a faux soft leather with even stitching. If youre looking for an introduction to the world of wireless earbuds as I was, then I think these are a very good place to start They were way too big! Thats why I bought several, as a stock-up option. I would definitely recommend these shoes and the quality is excellent.