I've been using a Wallybags 52" trifold for years, and it is both bulletproof and well laid out. The purchased model was this one, but is is now discontinued.

Doing some research it sure looks like Amazon is selling an nearly identical version under their own brand, which IMO may actually be made by Wallybags (looks to be 2" shorter in folded out length, which isn't a bad thing). I wouldn't hesitate to buy the version at the $51 price point (according to my Honey app, Amazon has dropped the price from $96 in the past month). Want to say I paid about $125 for the old Wallybags branded bag roughly nine years ago. It is in great condition after about forty trips (probably a half dozen as checked baggage).




.