The Off The Grid Ironside Flannel Shirt pairs heavyweight, dual-brushed cotton flannel with a quilted nylon lining built to hold its own as an outer layer. We built it for the days a regular flannel shirt isn't quite enough, layering warmth into the lining instead of piling on more shirts underneath. Seven pockets, including a zippered chest pocket and two lower hand pockets, keep it functional beyond just staying warm. What Our Gearhead(R) Experts Are Saying:"I've worn this straight through a chilly trailhead morning with nothing underneath but a T-shirt and stayed warm until the sun came up. The two lower hand pockets are deep enough that my hands don't come back out cold either."