Denim on the outside and flannel on the inside. This is the definitive tough yet comfortable work jean. The indigo jean has 10.5-ounce, 77% cotton/21% polyester/2% spandex. It features 6-ounce, 97%/3% spandex flannel lining for warmth and comfort. Work-Flex™ durable stretch technology makes crouching, crawling, and climbing all the more easier. It also improves stretch and recovery to help keep the jean's shape even after a hard day's work. The jean is a mid-rise, sits just below the waist, and has a relaxed-fit through the hip and thigh. Its straight leg fits over your boot nicely, and with five pockets, you've got room for everything. A contoured waistband prevents gapping the back.