I have used various Osprey women’s backpacks: have the ultralight now discontinued Lumina 45 L, which is truly light (1 lb 12 oz) and looks like a glorified plastic trash bag, never full, it needs to be cinched very tightly or it swings as you walk and I find it requires constant strap re-adjustments while walking
. My favorite is the Kyte 35 L weighing a little over 3 lbs and though most comfortable,yet lately due to severe arthritis, this has proved too heavy for me.
Just got a Deuter Speed Lite 28 L SL weighing 840 g. It will make its maiden voyage in about 5.5 weeks.
. If anyone is interested, I am happy to report back post Camino.
What matters most is that your pack fits You well and that You are happy with it. I like the convenience of a pack that will fit a water bladder (the Osprey brand is excellent) and getting a rain cover for it if you are walking anywhere in Galicia.