In reply to JackM92:
As stated above, Climb On is good for post climb skin care. I prefer the cream version and find it more effectve than other brands.
I've been dabbling with Rhin Skin Performfance and Tip Juice. These contain antihydral componets that reduce or stop your fingers sweating. This works well for me in that I find that chalk lasts longer and becuase my fingers slip a little less, my skin last a little longer. I think you can over do it and your skin can become too dry and start to crack, so I think care is needed but overall I'm convinced it helps me.
Another point is that I know some people who use hand moisterisers and their skin rips up much easier than mine. I think such creams soften the skin, as opposed to toughen it.