Perfectly sized and equipped for single day missions, the new Sparta' includes over 30L of cargo, laser-cut Mountain' MOLLE and our new 3L, 100oz Mil Spec Crux' Lumbar Reservoir, which delivers 25% more water per sip. Low Rider' technology uses a lumbar reservoir to move the water weight low for increased stability and a lower center of gravity. It is constructed of 500D Double-Rip Cordura' fabric for long lasting durability.