Pack your pilot supplies in the rugged B-17 Kit Bag and take to the skies. Matching the legendary toughness of the U.S. military’s B-17 Flying Fortress, we’ve built this duffle with thick 20-ounce twill, indestructible cotton webbing handles, antique brass zippers and an adjustable shoulder strap. Brushed Cotton twill. Tan. YKK Zippers.