For Spirit Airlines Personal Item Bag 18x14x8 Travel Duffel Bag Underseat Foldable Carry-on Luggage for Women

Make sure this fits by entering your model number.
SAVE YOUR CARRY ON CHARGES – Measures 17.7 x 12.6 x 6.3 inch, perfect fit personal item size 18 x 14 x 8 inch of Spirit Airlines & Frontier Airlines. It can be placed under seat to save your overweight charges.
25L CAPACITY – Enough to hold everything you need for in-flight comfort and entertainment. If you’re flying for overnight trip, this could easily be the only bag you need to carry.
EASY CARRYING – The Trolley sleeve on the weekender travel bag will slide easily over the handle of a common suitcase. It also has exterior pockets to storage your daily use item. The model B comes with detachable shoulder strap.（model A not included!）
DURABLE NYLON – Made of water-resistant and tear-resistant fabric. It protects your gears well from rain and easily holds heavy stuffs.
MULTIFUNCTIONAL – Use it as weekend bag, Overnight Bag, gym bag, sports bag, workout bag, travel tote bag, hospital bag, carry on bag. Perfect for all your travel needs.