(I do not have any connection to Red Oxx, except as a customer.)
PUP bag. I really like this bag. Versatile as a purse/ lunch tote/convention bag/airline under seat bag.
Pro.s: good pocket organization, trolley strap, can hold 1 days worth of clothes in a packing cube. The nylon straps are fine for hauling short periods of time and short distances. For long distances and long carry time periods - I recommend the rubber claw shoulder strap at an extra charge.
Zipper pulls come in a black reflective color which is different than the online photos showing silver gray pulls. I bought and added the bright red reflective zipper pulls for contrast and fun.
I recommend this bag.
(If you need a larger underseat bag that can hold 3 days of clothes - get the MUTT.)