I also noticed the stereo speakers are launder and clearer than the S20+. Arrived with one of the heel straps upside down though I highly recommend it for carbon mountain bikes. It really looks wonderful, and is very sturdy. Man kann wesentlich besser laufen, als in normalen Gummistiefeln. (Although some days I do! that?s why they got 4/5 stars, otherwise i would have given them a 5/5! If they do get a little loose I just wash them on gentle and air dry and back to normal. The foot bed is soft, yet sturdy and substantial. Material appears quality but this is from observing my daughters reaction.