You can look around until the cows come home, but you're going to have a tough time finding a boot that's as warm and stylish as the Keen Women's Betty II Boot. The Betty II surrounds your foot in insulation from under your foot to the middle of your calf. Keen uses its 200 gram Keen. Warm insulation, which is made with charcoal to hold heat in an eco friendly cradle of foot toastiness. Between the sole and footbed, Keen places a Thermal Heat Shield to keep the cold snow from giving you the chills. The tough nubuck upper with its Keen. Dry waterproof breathable membrane is built to hold up to winter after winter of abuse, and the Keen. DCR outsole is designed to harden in cold temperatures for better traction on slick, icy surfaces.