BAGSMART For Spirit Airlines Personal Item Bag 18x14x8 。BAGSMART Personal Item Bag 18x14x8, Foldable Travel Duffel Bag Tote Weekend Overnight Bag Carry on Luggage for Women and Men(Navy Blue) Foldable duffle bag sizes: 17.7 x 12.6 x 6.3 inch fits personal item size 18 x 14 x 8 inch of Spirit Airlines & Frontier Airlines perfectly, you can put it under your seat without paying carry-on luggage fees Capacity is 23L and weight is only 0.97lbs. Simple and easy to fold, folds up to save space when you\'re not using it External zippered pocket to safely store small items. This small travel bag is usually suitable for short trips of about 2 days Adjustable shoulder straps + Trolley sleeve + Reinforced webbing + Metal zipper Not only is it essential for travel, personal bag for air travel. And it can double as a weekender bag, travel tote bag, hospital bag, gym duffle, duffel bag