17X13X8 Inches JetBlus Airlines Personal Item Under Seat Duffel bag Suitable for Major Airlines including Spirit, Jetblue, Frontier, and American - Duffel Bag Design (Black)

Well made! Not quite the maximum Spirit Air size (which allows 18x14x8 for a free personal item carry on), because it is 17x13x8, but it is close. The two external zippered pockets (one on top for phone, the other in front for papers) are useful. There is an inner buttoned flap, presumably for a tablet, but if yo don't have one it takes up precious space. Yes, you carry cram almost as much in a full size (15.5") laptop briefcase, but they don't have wheels!Update: It also has numerous zippered pockets of various sizes on the inside.

This is a small but mighty carry on. We were able to put it in an overhead bin, but it would have been small enough to fit under the seat on an AA overseas 330 jet.I was concerned with its durability since the outside looks like to could tear easily, but it performed without flaw on an overseas trip.

The outside zipper pocket broke mid travel and I lost personal items. Poor quality material.

This was a great bag. It’s very good for traveling (Light) and it doesn’t take too much space.

We purchased 5; one for each family member. Great quality and a perfect size!

Amazing what you can fit in it and it fits perfectly under the airplane seat. Perfect size!

With this bag I was able to make a 5 day trip and have all of my items packed securely inside. No hassle with checked baggage or extra fees. More than satisfied with this purchase.

Just a simple cloth bag with handles and a strap. Worth about $10.