The Osprey Exos 58 Pack is a superlight backpack for speedy hikers that like to keep it simple and pack only what they need. The 58 liter is the largest of the Exos series, so you can pack up and hit the trail, whether you're just going for a week or thru-hiking the AT. Available in three sizes for a proper fit to the sewn-in ExoForm™ harness and hipbelt, they are foam wrapped in a layered mesh for breathable, cushioned comfort. The harness has two drop-in mesh pockets while the hipbelt has two zippered pockets for quick access to energy gels or granola bars, a camera, or your compass. The removable items include the top pocket, sleeping pad straps and side compression straps so you can easily convert the pack depending on your needs.