Thanks for reaching out to us! Because everyone has a different opinion about how cold is too cold which should be taken into consideration, there is no specific temperature range. The Merrell Moab Polar Waterproof Boots are designed to be your go-to winter hiking boots! Besides having a waterproof shell, the 400g M Select WARM lightweight insulation and Merrell Conductor fleece help ensure your feet stay toasty warm in cold winter conditions. I hope this helps you out!
Date published: 2015-12-10