Geigerrig’s Rig 500 Ballistic hydration pack is a ruggedly constructed and thoughtfully designed piece of trail equipment. It features not only 500 cubic inches of storage capacity, but also holds 2 liters of liquid in a reservoir which the wearer pressurizes with an onboard bulb-stlye pump. Geigerrig designed this pack to encourage better hydration and claims that the wearer will drink 30% more water than if they were wearing a non-pressurized unit. Other suggested uses for this pressurized water include sharing with friends, pets, and cleaning off muddy shoes or bike tires. The Rig 500 is just one model in a large line of similarly equipped available sizes to meet the needs of everybody. Available in citrus and black colors.