Designed for function, detailed for comfort, and built to handle with ease high-exertion outdoor situations; 4-way stretch, highly breathable and weather-resistant fabric construction; Form-flex waist for unmatched comfort and fit; Waterproof laminated knee and seat areas; Fully-articulated leg/knee provides mobility-enhancing support; Ergonomically angled YKK zippered gear pockets hold essentials in place and allow for quick and easy access from any position; Vent zips on rear of legs; Midweight Version: 15 oz