Mountainsmith Lumbar-Classic Series Nitro TLS R Backpack
The   Nitro lumbar pack is lightweight and low profiled, making it ideal for short trail runs, day hikes, or getting pulled by Cosmo around the lake. The Nitro offers 185 cubic inches of storage, enough for a wallet, snacks, iPod, cell phone, keys, and other valuables. The bag also offers several storage pockets, including a zippered main compartment, an internal hanging zippered compartment, and a front zippered pocket. And   hikers will appreciate the Nitro's recycled ReDura PET body fabric, which is made of recycled plastic bottles. Other features include an adjustable waist belt, a key clip, YKK zippers, Hypalon and nylon Kodra reinforcements, and a 210-denier ripstop liner. The Nitro measures 12 by 6.25 by 5.5 inches (W x H x D) and weighs 4 ounces.