Spider-Man style, . . if spider man needed chalk. . .
I sweat like a mo-fo and this stuff helps in ways I can't describe. I coat my whole hand in this chalk, then i'm good to go. Keeps my pores from throwing up all over the wall at least.
I have one annoyance with it, If i'm sweating especially bad or if it is especially humid outside, it tends to absorb the moisture so well that it'll clump and simply flake off your hands (but your hand will be dry!). All that it takes is a little reapplication and you're good to go for some added friction. Really does absorb moisture, and doesn't leave my hands dry and cracked afterwords.
I'll be using this chalk till the end of time, or this in a mix ;)