We had some heat recently. Nothing big, but we're Coasties. I could see the new guy sweating away in the sun, working in a less than really efficient way. Probably needed to cool down. He was arguing with me about how his way was plenty efficient, and if it were 5 to 10 degrees hotter, he'd work more efficiently because it would then be worthwhile. HUH?
Thinking about getting one for the groundie. In the tree, maybe, but usually in the shade to a degree, except for chunking a spar, and then sometimes.