Plenty of storage, still incredibly lightweight and WELL-CONSTRUCTED and DESIGNED. It has been put to lots and lots of good use during this pandemic when taking to the trails is not only a pleasure but a sense of normalcy. It is sizeable enough for camping out overnight or having a long day in the great outdoors and has plenty of pockets and zippers so all of your belongings are secure. It is on the pricier side for backpacks but quality is everything when it comes to comfort and safety.I don't bother with other backpack manufacturers anymore. Ospreys have been consistently good to me; their price premium is worth the quality and peace of mind to me, (though that equation won't be the same for everyone).The 45 is just the right size for an overnight/weekend trip, and it's great as a carry-on. It's adjustable enough that it works for my lanky 6'3" frame, and when you've dialed it in, it disappears in use. The full length zippers make both packing and finding things really simple and fast. Materials and zippers are all top shelf; they did make the effort to construct this out of recycled material, but it does not appear to be any less quality from their usual offerings. This is a minimalist backpack, so it doesn't have hundreds of superfluous straps; it does make it slightly less versatile, but also lighter and much easier to use without all of that mess getting in the way, (especially true while stuffing it into an aircraft overhead compartment).One last thing: Osprey's warranty is unbeatable. You'll wear out before the pack does, but if you have an issue 30 years from now, they'll still cover it.Osprey makes packs that are almost bespoke in their level of quality.I already have a 70L Osprey, but wanted something slightly smaller for Day/Short Weekend Trips.The frame, harness and straps are very well done. This pack can be fully weighted down and due to it's overall design, it's going to feel as if you're carrying far less. This pack helps a great deal with fatigue and overall body feel.Every stitch of this pack is perfect.Every zipper is perfect.Every compartment and cover is well thought out.The simple fact is, this is a pack so well made, you'll get bored with it before you ever actually need a new one.Look, I don't typically get overtly excited for products, but Osprey is just in a league of their own.Absolutely recommended with no reservations.5 starsCheers!I've not been able to take this bag on an excursion. But after unpacking it and trying it out, it looks super well made, the bag itself is a heavy duty material that seems super durable. It’s very light and the shoulder and hip straps are super comfortable and form to my body well. Lots of nice pockets and the 45L is plenty for any multiday back packing trip.