A stretchy technical top ideal for cool weather runs, hikes, and other trail outings, the comet long sleeve half zip is a highly functional pullover for moving fast in chilly conditions. The comet long sleeve half zip features our core spun fabric, which uses nylon fibers wrapped in Merino wool for added strength and durability that retains next-to-skin softness. In the underarm panels, we added breathable Merino mesh fabric to aid in ventilation during high-output days. Bonded seams eliminate chafing, while thumbhole cuffs add a touch of warmth and functionality, and make for easy layering.