The SIXS Carbon Merino Underwear® long sleeve stand-up collar jersey with zipper is breathable and thermo-regulating in all conditions. The long sleeves completely wrap around the arms, keep the skin fresh and lie between the skin and overgarment. At the same time, they easily protect against cold draughts when a short sleeve version is worn over the shirt. The contrasting stand-up collar, which can be opened via the practical zipper at the front, also protects the neck from sudden changes in temperature and drafts. Features Seamless technology Antistatic system