Z1R Timber Flannel Shirt The Z1R Timber Flannel is made from thick 100 thermal cotton, making it a great addition to your winter closet. This flannel looks and feels so good, you'll forget it's even a motorcycle shirt. Lined with a mesh inside, all of your sweat will be soaked up to keep your back nice and dry. Features Thick 100 cotton flannel chassis Full-length thermal liner Metal snap and concealed zipper front closure Extended-length jacket tail Expanded shoulder gussets for increased mobility Two interior conceal-and-carry pockets Two exterior chest pockets Two hand warmer pockets Adjustable metal snap wrist closure