Caroline is a mid calf boot with a front zipper, and a stitching pattern that streamlines the design. It is felt lined and has a thin layer of foil inside for warmth. The leather/nylon combination is also waterproof lined, and weather rated for minus 20 degrees Celsius. The footbed has been upgraded for optimum support and comfort. This boot also has the OC System – a grip system which allows for enhanced traction and grip in icy conditions. The grip simply pops out and twists when needed which brings down a set of metal spikes for traction.