Shop our vegan Underseat Luggage from the best U.S brands, our Underseat Luggage are made from 100% animal-free and alternative/sustainable/ Vegan leather. all made of high-quality and cruelty-free materials- all of them in 1 place. Underseat luggage is specifically designed and shaped to fit beneath the average airplane seat, so you can keep everything you need close at hand at all times. The best underseat luggage is one that’s small enough to meet the airline's requirements, but practical enough for everything you'll need during your flight. The personal item bag size is the most important factor. Each airline has its own specific dimensions when it comes to carry on personal item size – although generally, expect it to be somewhere around 8 x 14 x 18 inches (20 x 35 x 45cm).