Putting shoulder straps and a belt on a silnylon sack might be super lightweight, but without real suspension it can feel like youre hauling a sack of potatoes. So Osprey created the Exos 34 Backpack. This lightweight pack has a comfy, breathable foam panel so you dont get a sweat-soaked back and a lightweight yet sturdy aluminum frame so the Exos holds its shape. An ergonomic hip-belt and compression straps ensure your load rests where it should for max efficiency and minimal body aching. Low-profile pockets and sleeping bag straps let you organize your gear.