When we first endeavored to bring a hydration reservoir to market, we knew it had to be groundbreaking in all respects – carrying water should never compromise fit, comfort or stability in a pack. The Osprey Hydraulics™ reservoir is now entirely designed and manufactured by Osprey, carrying forward key innovations while offering major improvement to many features. Combined with excellent reservoir-to-pack integration, superior technical features and the best gender specific pack-to-body fit and performance available, our hands free hydration program takes another giant leap.