I used the same picks with 0.6mm thickness in the past. A great all around pick for both lead and rythm but they barely last 2 months under daily use.
So I bought a pack of these to test their durability and so far Im content with the outcome.
They barely have signs of use, they do feel comfortable to hold but I find it hard to use them for strumming since they tend to bounce of my fingers.
Maybe I ll get used to them though, since I almost doubled my pick-ness (pick thickness,get it? ) over the past 8 or so months.
Anyway definitely worth trying these ultex picks if you hands sweat a lot like mine do.