Ospreys Atmos AG 65 practically defies the laws of physics with its anti-gravity suspension. Its ventilated back panel has an adjustable harness so that the weight of your pack is kept close for a comfortable fit. Those using a little more hardware can stow either trekking poles or ice tools with the use of side loops and bungee tie-offs. The main compartment can fit about a weeks worth of essentials. 65 Liters to be exact. But that doesnt mean you need to go digging for your valuables. Pockets along the waistband and on the front panel, secured by zippers and stretch mesh, are perfect for keeping water bottles, granola bars, rain gear, and other items handy for when the campsite isnt quite a stones throw away.