Get safety and style in one hard working boot. This waterproof Frostline Hiker Boot is ready for your hard day. The Frostline Hiker Boot is a freezer boot that won't crack under the pressure or from the cold. With protection down to -15°F, winter temps will feel like a summer day.When workers aren't weighed down, they accomplish amazing things. With Frostline Collection, you get incredibly lightweight gear that is durable, flexible and crazy warm.