8-ounce, 98% cotton/2% spandex canvas. 2.3 ounce, 100% polyester knit flannel lining. Rugged Flex durable stretch technology for ease of movement. Sits at the waist. Comfortable fit through the seat and thigh with room to move. Reinforced front slash pocket. Stronger sewn-on-seam belt loops. Right leg secured cell phone pocket. Straight leg opening.