Use this shoe when running on packed snow, not on bare roads. Super light and amazing traction in the snow. My feet have never been cold in these (I do wear wool socks in them) and I run outside in up to -30C. The attached gator is awesome and keeps the snow out and warmth in. Don’t wear these inside on wood floors or on wooden decks as the metal spikes leave marks. I do get a slight pinch point on the inside ankle, but put a small piece of foam there to cushion that. Wish they came in women’s sizes so all my friends could get them too.