Multi packs here too. My everytrip backpack for past year has been an REI Flash 50, have a new Gregory Baltoro 70 that I plan on using for long trips or heavy load cold weather trips. I also have a smaller 25ish liter Kelty daypack for stictly dayhikes. I then have a REI Flash 18 which I use as a stuffsack inside my larger Flash50 / Gregory, which converts to my dayhiker when I hit camp.