I use hikers and crack shot snake gaiters. Still a little hot, but not as hot as snake boots, and more comfortable by a long shot.
As to the safety of it, I'm not sure. Never had to have the gaiters or hikers tested. Hopefully never will. I like the crack shots...extend down over about half of the foot, so the last half of your foot (I'd think soles would be fine) would be the only potential weak spot.
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