Come winter, city streets may be cold and unforgiving, but that doesn't mean your shoe game has to suffer. Our shearling-lined ZERØGRAND All-Terrain Waterproof Bootie is fully waterproof to keep snow and slush at bay, and features a toothy rubber sole that's been cushioned with Grand.ØS technology for cushy winter comfort. Whether you're making the trek to work or taking a walk in the woods on a chilly day, these slip-on boots are the perfect cold-weather option. Boot is a convertible style and can be worn with front collar flipped down to expose the shearling.