TPRC 15” Underseat Carry-On Luggage Airline Approved Personal Item with USB Charging Port, Black

Thank you for this post because I was going crazy. I bought a similar item on amazon and I got a good deal and hated the thought of it not working out. I called Southwest and they said as long as its softsided and can be shoved underneath the seat it should be ok. The item I purchased: https://a.co/d/01Rc7M91

https://a.co/d/1YdbemG

This is not a backpack but a rolling suitcase - and it fits in the personal item sizer so long as you don’t overpack it to the point where it expands. Absolutely worth the purchase, pays for itself in one leg.