NO slip but..
I only had the shoe for about 1 week. I wore it daily for 3 days to break it in which really was not necessary. They fit and wore great right out of the box. The traction on the trail was great dry rocks, wet rocks no slipping. High boulder hopping was fine as well. The problem however was constant lack of lateral support. I probably turned both ankles 10-12 times, not an exaggeration while back and forth on approach. I became disgusted because I really liked the shoe but found the constant twisting of my ankles too much too take so I return them this week.