Designed for function, detailed for comfort and built to handle high-exertion outdoor situations with ease; 4-way stretch, highly breathable and weather-resistant fabric construction; Rip-stop abrasion resistant fabric; Vented rear for air flow; Articulated shoulders allow for free range of arm motion; YKK zippered chest pocket; Magnetic closure chest pocket; Roll-up shirt sleeve buttons; Lightweight 11.5 oz construction