Most parts of the US have to worry about the frost line when it comes to construction, but there are parts of Alaska where the ground only thaws to a given depth each year. The best solution for dealing with that unyielding cold? Layer up right. Thaw Depth fleece was built to be your flexible, central layer of warmth, made of a soft two-sided fleece that holds heats on its own in chill weather and acts as extra insulation under snow or work pants in bitter cold. With gust-blocking features like rib cuffs and a cinchable hem, plus a Crouch Gusset® to keep you mobile. And it’s partly made of recycled polyester – nature may not intend to do you any favors, but you can do one for it nonetheless.