This is my 2nd pair. I liked my 1st so much I ordered a 2nd pair to keep in my car. I just wore the new pair on a walk. No slipping despite walking quickly on solid ice for an hour. I cannot speak to longevity yet because Ive only owned my 1st pair for a month. But I walk my pups 2-3 times daily for 30 - 60 minutes. Ive had no falls in the last monthI had 3 falls in the 2 weeks leading up to my first purchase of these.

My only complaint is that these do not stay on if walking in deep snow at all. But, technically they're not for that purpose so I didn't take any stars off. But, if you have to go off trail and walk in deep snow, check your feet as you might lose these in the snow.

Regarding sizing, I bought a medium and they fit my female size 9 shoe with no trouble.

Prior to these I tried 2 other types of tractionon the first, the rubber snapped immediately and the other pair didn't provide any traction.