This compact 17×13×6.5-inch foldable duffel meets Spirit/Frontier Airlines' personal item size requirements, saving you carry-on fees while fitting under seats. Built with waterproof, tear-resistant fabric and reinforced handles (45+ lb capacity), it features an exterior pocket for quick access and a trolley sleeve for suitcase attachment. The adjustable wide handles reduce hand strain, and its collapsible design makes it perfect as a gym bag, weekend traveler, or emergency hospital kit.