Some lumbar packs are so big, it looks like theres a half a horse riding on your rear. Some are so small that theyre basically pointless. Then theres the Kelty Kestrel Lumbar Pack. This mid-sized pack holds a light rain jacket, snacks, and water bottles for a day hike, and sunscreen, shades, and guide books for trips into town. The mesh waist-belt tucks away for casual walksjust use the padded shoulder strap or the top carry handle instead.