If you're familiar with rainwear, you know the difference between 2 and 3-layer construction. (If you're not, you should check out the Knowledge tab at the top of the page.) 3-layer construction isn't often used in gloves and mittens, because it makes for very complex manufacturing and it drives up the price point pretty quick. But when it is, the results are so worthwhile: handwear that is super durable and super waterproof, without bulk and without any slippage between inner and outer fabric. Outdoor Designs brings you this excellent construction in their Summit Mitt, a fully waterproof and seam-taped 3-layer overmitt that can keep your hands dry in the nastiest of weather.