We worked with guides to develop our pinnacle adventure shirt - the Expedition Pro. Offering proven Expedition performance - breathability, durability, storage, moisture management - we took it to another level with added stretch, ventilation, and a greener 100% recycled polyester. Integrated technologies help it regulate temperature and clean up quickly, and every detail is fine-tuned to meet the demands of trekking, long hikes, and extended backpacking trips.