REI Trail 25

The REI Trail 25 is a favorite of mine.

If you don’t need a laptop sleeve, the REI Trail 25 is similar and 18”x13”x8”.

I have an REI Trail 25 that is 18”x13”x8” vs the CZ36 at 17.7”x12.2”x7.9” I use that as my under seat maximum. It has a fair amount of top to bottom taper so it might not pack as much. It does have a plastic frame sheet, sternum strap, waist belt, rain cover and daisy chains.

The REI Trail 25 is one of my favorites, but it has typical mesh water bottle pockets. At 18”x13”x8” it will fit under a seat.

REI Trail 25 or Commuter 22, Patagonia Black Hole 32.

I normally use an REI trail 25 and it’s both a comfortable bag for hiking and works well as an under seat personal item on US carriers, including Southwest.

The REI Trail 25 is 18”x13”x8” and fits under a seat.

I like the REI Trail 25 for this niche but it has no laptop sleeve. Big side pockets.

The REI Trail 25 is perfect and I use packing cubes and pouches. It is 18”x13”x8” and is still very useable as a day bag.