Our super duper warm mittens are made from 100% merino wool, which is knit and then felted, just like all of our cozy winter wear. The felting creates a seamless and durable material that is wind-proof and water resistant. A sleek fitted shape that is extra long (no gaps between your coat and mitts!). One size fits most. These mittens will felt and shape to your hands as you wear them for a custom fit.