Serious trekkers who are used to carrying a heavy backpack will know that a sturdy frame can better distribute the weight over your body. Unfortunately the frame adds weight to your load as well, unless it's made mostly of air like this new inflatable Air Beam by Klymit.
The Air Beam is made of a lightweight fabric, and weighs just 2.4 ounces (which is less than half of what a plastic frame weighs). The Air Beam is inflated using an included hand pump, and the pad helps transfer heavy loads on your back to your hips for increased comfort. The $50 pad also prevents objects within your bag from poking you, and it also doubles as a minimalist air mattress.
What more, the Air Beam can flex along with a hiker so it provides support even when a hiker is in an awkward position like bending over to tie their laces, or crouching for whatever reason.