This is on my gift list. Any recommendations are appreciated. Day use mountain hiking.

I got the 5.11 skyweight 24L for day hiking and skiing and took the waist belt off. Pretty happy so far. Light, comfortable, cinches down real small and you don't look like a mall ninja

Talon 11 Pack - Men's I like this one. I use it all the time.

I have a REI Trail 40 that I use a ton unless I'm wearing our baby backpack.

https://www.rei.com/product/227956/rei-co-op-trail-40-pack-mens

(kids: https://www.rei.com/product/147417/deuter-kid-comfort-child-carrier)

Former US Marine so I use a USMC Issued FILBE Pack. You can find them online used & also at Army/Navy stores if your not prior military.

This is my go to pack, unless I am hunting.

kuiu.com/products/venture-divide-2000-verde-camouflage?variant=41481697198238&utm_source=google&utm_medium=paid&utm_campaign={{campaign.name}}&utm_content={{adgroup.name}}&utm_term={}&gad_source=1&gad_campaignid=22863892557&gbraid=0AAAAADg1fetSfu3ZulB8kLe6hlMmIxiUh&gclid=CjwKCAiAlrXJBhBAEiwA-5pgwpnn_CHbHFahZQ1OloTsxqwjyK-j2LBbxZdbsADEdm1RUPBMEdNCkhoCAjQQAvD_BwE

For me the daypack has to be light. I'm packing some essentials, a little water, snacks, and a jacket. I carry a camera. I want tight to the torso and secure with a chest and waist straps. After that, it is about other features. I like a smaller pocket up top for personal items. Then a bigger pocket. I want realtively water resistent. I don't want a huge pack.

Of course I have a bunch of options for different needs sizes.