So Ive been able to get everything I need for 5 days into the REI flash 30 pack. I think Ive done a good job of packing light and small but after packing it and trying it out, it just isnt comfortable.
After about 20 minutes of walking with it, my lower back gets uncomfortable. Because it is a smaller pack, they didnt include a few straps and I was wondering if:
1) the missing strap adjustments are the problem.
2) I packed it or adjusted it poorly. (I put my bag on the bottom and it causes the lower back pad to curve away from my lower back.)
3) there are any recommendations for a 30 – 35 L backpack that is more comfortable.

