After using both Yaktrax Pro and Yaktrax Run on hard pack, ice, soft pack, slush, and mud I have a couple more observations. Yaktrax Run with spikes on the front part of the foot do better in very cold conditions with hard pack snow surfaces and firm ice. Yaktrax Pro are much better though when temperatures are above freezing, and the snow is loose and melting. Just adding an observation. Temps are back up way above freezing for a while. It’s nice being outside in warm winter weather, and the sunshine feels great!