>>2252858it's doable if you're very minimal with your packing, but i'd say like 20-25lbs is the max if you want to be comfortable hiking without a hip belt
I use my jaakari S all the time as a day bag, but if i'm going to be spending a night or two I just through everything in my L because it's much more comfortable for hauling sleeping bag and pad and all that stuff than trying to strap things to the outside of my S