Idaho Skier wrote a review of CamelBak Alterra Lumbar Pack - .8L on February 25, 2009
I am training for a 50 mile ultra and so far this little pack has worked great! Perfect amount of water for long runs (20milesish). I have a 28 inch waist and the pack only has about a inch and a half on each side of tightening room and when the bladder is empty its almost maxed out. nice storage on the waist band, each pocket can hold two power gels. The two pockets on the back can hold 5-6 power gels. The elastic band is super nice on the back. I keep a light jacket in there and on super long runs (25+) i have a water bottle that i strap in. Pack doesn't bounce or slosh whatsoever and is super comfortable.