Save Carry-on Charges: The Spirit Airlines duffle Bag size 17.7x 12.2 x 6.7 inch fits personal item size 18 x 14 x 8 inch of Spirit Airlines & Frontier Airlines perfectly, which can be placed under seat and no need to pay carry-on. Sturdy Fabric: The travel duffle bag is Upgraded with superior material and construction, the bag can hold its shape when empty. Feel comfortable when carrying. Packable & Compact: Based on the needs and suggestions of customers, the Foldable Travel Duffle Bag NW3142 can be folded up into its own external pouch when not in use for easy storage! Water-resistant Double Metal Zippers Extra Shoulder Straps With Front Pocket