Incredibly comfortable long-sleeved trekking shirt in durable partly recycled polyester with mechanical stretch giving it good freedom of movement. The fabric is also soft, quick drying and wicks away moisture, keeping you warm and happy on the trail. Reinforcements with G-1000 Air Stretch on the elbows, lower sleeves, shoulders and back yoke give this shirt incredible durability ensuring that it will be with you on trekking adventures for many years to come.