You switch over your wardrobe when seasons change, so why shouldn't you do the same with your running shoes?
We checked with Anne and Kate Pezalla---sisters, running coaches and owners of Lively Athletics, a women-focused fitness store in Oak Park, Illinois---and their argument makes sense to us:
Typical running shoes are made to breathe. (Translation: They let in outside air.) So in freezing conditions, try an insulated, waterproof style like On Running's Cloudrunner Winter Edition.
Stability Is a Must
Sneakers designed for wintery conditions---like Pearl Izumi's EM Trail M2--are often more stable, with a wider base that prevents your foot or ankle from rolling too much upon impact.
Get a Grip
Trail shoes aren't just for hiking. Their extra-grippy soles can handle almost any kind of unpredictable terrain. Newton's Boco AT, which employs multi-directional lugs on the sole, provides extra stability in snow.
The Shoe Should Fit
Running shoes should be a half size to a full size larger than street shoes. Your feet swell as you exercise, plus you need plenty of space for warmer, thicker socks. (Try these cute merino ones by Darn Tough.)