Work extremely well...for a while
Took these on a 2 day winter hike up mount mitchell and the black mountain ridgeline. Snow reports were 6-8 inches on the ridges so I knew I needed some extra traction. I wore these the entire time, with conditions ranging from slush to ice to deep snow. The yaktrax performed extremely well in all conditions. In 2 days I did not slip once, including going up a stairway of rocks that were covered with 2 inches of smooth ice with a 45 pound pack on. My only complaint on functionality is that wet snow will clump up very quickly and needs to be broken up. Other than that, these perform beautifully. But by the end of the 2 day trip, the rubber straps on each crampon had broken, which caused the metal coils to fall off. With only two days of use, these are basically disposable, one time use, which is not ideal.