Shell: 50% nylon/43% polyester/7% spandex Passing the AATCC rainwear test, the water- and wind-resistant construction blocks out the elements, helping you stay warm and dry in the process Four-way stretch construction with a gusset gives you a more natural range of motion Zippered ankles make it easy to pull this pair over your hiking boots and offer ventilation Zippered hand pockets and back pocket Elastic waistband for a comfortable fit With belt loops Zippered pocket on right leg for keeping smaller items close by Paneled design with articulated knees for an ergonomic fit that moves with your body Wide-legged design bought in an emergency as the only size available, but a little too big for my layering system