also, often synthetic doesnt stretch. But thosell set you back another £100 or more for the two. The moccasins fairly glided onto my feet and took the form of my feet without any sensation of pressure. Definitely not crazy about the comfort and fit of the Pros directly out of the box. While not having the decibel reduction of the all foam hearing protectors. The first time I used it, my bike came loose at the defective mounting bracket that attaches to the bike frame. Its on wheels so I can move it wherever I need. molto comode. Good sound quality and look and feel durable. I was a bit concerned, because my feet are wide, but these shoes shape themselves to my feet.