Foldable Travel Duffel Bag with Shoulder Strap Tote Carry on Luggage

- Bag size 18 x 13 x 6.3 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. - Fold up when you not use, does not take much space in your luggage, unfolded as extra bag for souvenir or clothes when travelling leaves room for valuables in your suitcase, or used as a carry-on with decent size to fit under an airline seat or in the overhead bin in case you are overweight for a checked bag. - Solid straps bear the weight more than 45 pounds, no need to worry any ripping or break during trips. Plus it also comes with an extra shoulder strap.