The Ripcord by Outdoor Products is a great hydration pack at a value price.  Great for short or extended day trips, this full featured hydration pack features a 2 Liter Cyclone® bladder to keep plenty of liquid close at hand.  But, as a pack, it's a winner too.

The back has abundant padding and includes the Airway™ cooling system that allows air to circulate to hard to reach places.  A double release front compression bib keeps the load small and tight, while abundant reflective piping adds safety for early morning and late evening strolls.

This pack's not all work and no play though.  An easy access music compartment houses your MP3 and features a rubber headphone port.   Other amenities include a removeable clear zippered ID/creditcard/money pouch, and a hose clip that attaches to either right or left side shoulder strap.