Ski mittens are an essential piece of gear for anyone hitting the slopes. Mittens keep your hands warm and dry, and they provide a better grip on ski poles than gloves. Waterproof ski mittens will keep your hands dry even if you fall into the snow. Insulated ski mittens will keep your hands warm even on the coldest days. Choose a pair of ski mittens that fits snugly so that they don't slip off when you're skiing.