Five Ten Freeriders have sticky soles. I've paired mine with pinned flat pedals (DMR V12s, but there are a large number of competitors at all price levels). Whenever a knee hurts, I've been able to find a place on the shoe that makes the pain stop. The fact that I'm not clipped in allows me to micro adjust both the fore-aft position and the toe-in and toe-out of my foot on the pedal. The pins keep my foot in close contact with the pedals almost as much as toe clips do.