It doesnt work, if you have any rubber detailing on your gloves that catch on them, and they will split if used on the outside (they're not that tough)  The whole idea of having them on the inside is just to keep your hands warm, that fact that any sweat you build up is stuck there aids the warmth. And if anyone doesnt like the idea of having horrible sweaty hands all day then just take 3 or 4 pairs with you.  Riding gloves are designed to be tough, grippy and protective, let them do their job, and let these keep you warm