Work warmer in Carhartt® Rugged Flex® Rigby Knit Flannel-Lined Dungarees for Men. These men’s work pants feature Rugged Flex durable stretch technology, which helps you move more easily while still keeping your bottom half protected from scuffs and scrapes. 8-oz. 98% cotton/2% spandex canvas is lined with 2.3-oz. 100% polyester knit flannel for extra warmth. Design details include a relaxed seat and thighs, straight leg openings, and stronger sewn-on-seam belt loops to help carry heavy loads. These Carhartt flannel-lined pants sit at the waist and have 6 pockets in all, including a right-leg zip cell-phone pocket and a reinforced front slash pocket. Machine wash. Imported.