The Columbia Girls' Powderbug Forty Boot brings the toasty embrace of the fireplace with you out into the snow with its furnace-like 400g insulation, which is rated at -40F (hence the name). Secure your fit with the customizable drawcord and adjustable hook-and-loop strap before heading off into the snowy playland. The waterproof synthetic leather and nylon textile upper, combined with a seam-taped construction, delivers protection from the elements during any cold-weather adventure. If you happen to notice a funky odor emanating from these boots, take out the 6mm recycled felt liner and toss it in the wash for a quick refresher. Whether shoveling the walk or heading out with the sled, the one-piece, injection-molded TPR shell provides stable footing over slick, unpredictable surfaces.