Find unbeatable warmth on the inside with a soft, warm upper back panel that moves with you and an insulated, nylon panel to protect your lower back where warmth tends to escape. Complete with a three-piece hood and inside adjustable toggles, the windproof power of this baby is not to be questioned. Water-resistant in its own right as a Yukon, the Yukon Flex is built with DRI DUCK Stretch canvas that provides water-resistance and stretch all in one. You'll want for nothing.