With the Bogs B Moc Infant Boot you can bundle up and be done. Its warm, featherlight, 100% waterproof, and equipped with a slipper-soft wicking lining that will keep your little one warm, dry, comfortable, and snuggly from campground to playground. It features DuraFresh bio-technology that activates to fight odors, while the Max-Wick moves sweat away from your foot to keep you dry. The rebound technology in the outsole provides lasting comfort. Its comfort rated to -4F/-20C.