Down-Like Warmth For Your Feet. There's more to the mountains than skiing. The Cloud Cap keeps your feet warm and comfy as you trek the streets of your favorite snow-covered town. It comes fully equipped with Danner Dry and PrimaLoft insulation to keep feet dry and toasty as you run a few errands or grab a bite to eat. A Vibram Arctic Grip AT outsole keeps your footing secure on icy sidewalks.