I've climbed in the summer stihls which are ok but not great. They're not expensive though, and have the breathable material in back. I'm climbing in SIP climbing pants now. They're stretchy and comfortable, but very hot in summer. They're pretty much winter only pants. They've got more protection than the stihls though. My next pair will be cloggers. You can get them custom made by cloggers too, for not much more.
Chainsaw pants are compulsory for workcover insurance for anyone operating a saw in aus, but climbers are exempt. There are so few leg injuries for tree climbers; it's mostly hands, forearms and face. I like wearing them, mostly because it's more comfortable on spikes. When I trim in summer, I often wear shorts. It's just plain too hot, and some trimming work is handsaw stuff anyhow, or only a few cuts with a climbing saw.
Shaun
