>>1077303> min 10 L> 22 L for longer daysThat might be a bit too low for certain climates and seasons even for a daypack. Do you need to pack rain clothes? Extra layers for warmth? Do you plan to eat /out? Do you carry all water with you? Will it get colder or start snowing or windy? Do you want to change your shitty sweaty socks/shirt for the drive home when you arrive back at your car? And so on.
It can be hard to know what to take with you, but check the catalog here and reflect, with common sense, those ideas with your own. You obviously don't need a stapler, a dildo, a Darth Vader mask, chainsaw, pocket calculators and other shit. You probably don't need a machete or axe or hatchet. And so on.
If you plan to sit and have a coffee/tea on a nice vantage point, having binoculars can be fun too.
You're unlikely to die on a dayhike (grizzlies and other predators, rocks from space, skinwalkers and artillery notwithstanding), but you might get very dehydrated and/or hungry especially when spending hours upon hours /out on sunny days while moving all the time.
The only way to know is to figure out some basic set of stuff, then really just try it to get an idea of what you actually need. Many things might be non-obvious:
>toilet paper - easy to forget - "I won't shit /out I can hold">plastic bag to set over we mossy rocks to sit on>insect repellent to nuke them from the orbit>and so onI have a 40L bag which weighs ca.1 kg. Carrying it half-filled is no biggie, so one day or a few, anything goes and all that can be done with a single bag instead of two daybags. (I have also a 90L for more involved things)
