These shoes were recommended to me to keep my feet warm and dry in wet or cold conditions. I've run in these shoes 7 times, and they absolutely keep my feet warm and dry. I ran with them this morning in 18 degrees -- no trouble with cold, and I've also run with them while raining and they live up to the waterproof description. The Gortex and shoe details are great, and the fit is very comfortable. I have a pair of Salomon gaiters that I wear when running in snowy conditions to keep snow from entering at the sock line. The tread is grippy and is ready for ice studs if needed. I love this shoe so much I just bought a second pair -- so I can ice stud one pair and wear the others on cold or wet days that don't have icy conditions. Like most Brooks shoes, I ordered a 1/2 size up to accommodate warmer socks. Highly recommend!