This Pro Cordura Flex Pants features: Military grade fiber for extreme abrasion resistance, flex fabric for ease of movement and comfort, curved back yoke to follow movement and comfort, gusset for ease of movement, elastic waist for comfort, Durable Water Repellent, reinforced center back belt loop to suport heavy load, reinforced hem, front and back pocket openings, double knee for reinforcement and reflective accents. Material: Cotton, Nylon, Spandex.