The prAna Stretch Zion Long Sleeve is a relaxed-fit button up built from Stretch Zion twill with 2-way stretch, so it moves through a hike or a long day of travel without reading as technical gear. A PFC-free DWR treatment repels water and UPF 50+ protects against sun, while ventilated underarm gussets keep the shirt breathing when the pace picks up. It's built to handle the trail and then walk straight into dinner after. What Our Gearhead(R) Experts Are Saying:"I've had this shirt catch a passing rain shower on a hike and still look presentable walking into a restaurant that same night. The stretch never gave up room to move, even after hours on the trail."