Old Navy Slim 360 Stretch Black Jeans Adjustable Waist Girls Size 16 NWT Old Navy Slim Built-In Tough jeans offer a comfortable and durable fit with 360° stretch technology. These black denim pants feature a classic five-pocket design, an adjustable waist for the perfect fit, and a versatile slim silhouette. The faded wash provides a lived-in look, while the high-quality cotton blend ensures all-day comfort.