Pretty disappointed in this version and pretty sure they can improve. It is well made and attractive. I dont know what kind of processing theyre doing, but the mic does a great job filtering out or significantly reducing background audio so only my voice gets transmitted, clean and clear. One size fits all. Thieves and liars. I have tiny ear openings, and this fits me well, thanks to the three insert sizes and the over-the-ear loop. Bare that fact in mind if you have a narrow foot. Thank youBest regardsLouis Tan I think it would be better if the leather was sturdier so they don?t get holes. I was happily surprised.