The shoes have a plastic sole, not even rubber. Maintenance is none there. The built-in cleats protrude too much from the bottom out, so that you go on the sole but the cleats when not to go, they are very slippery and with the leg is already some times very strongly geknikt while walking. In terms of size, I'd say 41, not less. Seat comfort when you do not go with it. Unfortunately, I can no longer return the shoes, there already worn one week.