In reply to AdamLud:
> Upsalite does look rather promising though. I have been wondering why none of the big brands have thought about using it.
Probably because its expensive and not really necessary. I'm sure used properly this stuff will make your hands even drier, but normal chalk dries sweat off hands to cracking point as it is. A chalk bag full of saturated mesoporous chalk (as it will be after its been in your chalk bag for a week) isn't really going to make much difference in the real world use because you will have to open the bag immediately before use to prevent it absorbing moisture from the air.
At least there is more to this than the friction labs selling the same Hydromagnesite (chalk) as the next company but pretending to be scientists in order to market the emperors new clothes.
Looking forward to picking up the discarded condom bags that the black diamond stuff comes in at the bottom of my local crag soon....