Don't let your daypack turn into a black hole. The compact Ray allows easy organization, thanks to dividers in the main compartment, deep exterior side pockets, and a separate pocket for your hydration system. It's also light and secure enough for running. I ran the rigorous three-mile Jud Wiebe Trail, above Telluride, and the hipbelt and yoke-style shoulder harness kept the load in check. 1,200 cu in, 1.9 lbs; www.thenorthface.com
Bonus: It comes with a rain fly.
Bummer: Reservoir not included.