Old Navy Boy's Karate Built-In Flex Max Slim Denim Pants - Gray - Size 16

Built-In Flex Max: Uses double the stretch technology for maximum movement and comfort. Built-In Tough: Fabric has twice the strength of regular denim to help prevent rips and blown-out knees. Adjustable Fit: Features an interior adjustable waistband that expands and a snap-button (sizes 5–8) or regular button (sizes 10–18) closure. Design: Slim through the hip, thigh, and leg with classic functional pockets.  98% cotton 2% spandex/elastane  Tag does have line through it so you cannot attempt to return at Old Navy. Most places that sell these do this.