For years I have been using an extra backpack that I had laying around for all my day hiking. It’s a sturdy old Timbuk2 bag and works fine, but it is heavy and lacks a chest strap or any of the other features that a good daypack might have. I’ve been a fan of REI’s Flash series for years. I use an old model that I got on the cheap for backpacking. My hiking buddy uses one of the small Flash 18 packs for his day hiking. I wanted a bit more in the way of features so I decided on the Flash 22.