Be sure to size your boot by wearing a thicker sock or sock liner to make sure blood circulation isn’t compromised. Some winter conditions won’t be so extreme in temperature, and waterproof boots will suffice. We always recommend the waterproof boots for all hiking needs that don’t require additional insulation for extreme winter temperatures.
Wicking is important for any clothing that touches skin. The awesome thing about wicking fabric is it pulls moisture (sweat) away from you and moves it to the fabric’s outer surface, where it can dry quickly.
Insulated jackets and pants offer the best protection for extreme cold. Some outer shells have a layer of insulation built in—such as fleece—making them convenient for cold, wet conditions, but not as versatile for layering in fluctuating temperatures.