NWT Casey Classic Denim Overalls. The Casey Classic Denim Overalls are the timeless piece your wardrobe is missing. Made from the same invisible-stretch denim as our best-selling jeans for a look that is completely cool and completely comfortable. These overalls are designed with simple side-buttons on each side for each entry and a double-pocket on the bib. A true classic style all the way down to the easy, straight leg. 78% Cotton 19% Polyester 3% Elastane