As far as i can see none. The leather isn,t as slick when it gets wet[by rain or sweat]. I just like the way it looks and feels.when this st wears out i'll buy another set.. What can i say i like them.Now leather grip thats another story. they make the grip larger..And with someone with big hands that has arthoritis .ther a must. My hands dont get as tired on long rides.Dude...hope this helps.