Description OGIO Atlas 3L Hydration Pack The OGIO Atlas will take you all over the map with a 100 ounce reservoir and a stable, centrally buckling chest harness system. Features: 150D Mini honeycomb rip stop with TPE backing 420HD Oxford nylon with PU backing Fully adjustable chest harness system Mesh paneling for moisture management 17.25” H x 9.5” W x 3.5” D 305 cubic inches / 5 liter total capacity