Our washed duck dungaree is designed to last. Made of 9-ounce, 100% cotton duck it features a full seat and thigh, triple-stitched seams for durability, ruler pocket and double utility pockets. 3m-9m has a faux fly with an elastic back and functional snap. 12m-24m has a functional fly with back elastic. 2T-4T has a functional fly with an adjustable waist.