For those on a limited budget, commonly carry medium loads, or just want a pack that is easy to obtain, the Exos 48 is our top recommendation. For a lighter (around 7oz lighter, in fact!), more adaptable choice, check out our Editor's Choice Award Winner, the Gossamer Gear Mariposa. You can also remove the waist belt and frame on the Gossamer pack, adding to its adaptability. Our Top Pick for Ultralight Enthusiasts is a different animal altogether. It pares the feature set down to a minimum and weighs a full pound less than the Exos. If you're relatively new to ultralight and lightweight backpacking, or simply want a pack that performs incredibly well for medium weight loads, the Exos 48 is for you.
The Exos is also made in a 58-liter version (the Exos 58) for larger loads and a 38-liter version (Osprey Exos 38), pictured to the right. Ultralight backpackers who love the feature set of this pack can save 3 ounces with the 38-liter version. According to our independent volume tests, we think the Exos 38, minus its lid, would be weight competitive and similar in total volume to the Editors' Choice winner Gossamer Gear Gorilla.