The Exos Series really makes you stand back and realize how far pack technology has come. These ultra-lightweight packs are easy on your back and tough enough to carry the goods you’ll need for a multiday journey. And they counter the idea that to shed weight, you have to give up bells and whistles. The Exos 58, for instance, is a 58-liter (for the medium size) pack that weighs less than 3 pounds. Three pounds! And you still get a breathable mesh back panel. Smart compression straps can either sit inside or outside of side mesh pockets. A genius trekking pole strap system gets your poles out of the way for scrambles, and front zips provide easy access to stuff in the middle of your pack. Choose from the Exos 34, (medium at 34 liters and 2 pounds 2 ounces), the Exos 46 (medium at 46 liters and 2 pounds, 5 ounces) or the 58, depending on how much gear you need to carry.