I have tried countless picks, few of them worked for me because it is not just about sweating but also about the fact that usual picks don't "feel" well on the strings. These picks are amazing! I ordered them for fun but honestly I am impressed.
80% of the pick is made of rubber, the rest is of hard plastic I guess which really doesn't stick to the strings and attacks the string very well, it has that slippery feel on the string if you know what I am talking about.
It has indentations that along with the rubber will help a lot, plus they look so badass! Looks like I won't be using any other picks from now on.