The name says it all. Big ____ MOTHERLODE. With over 47L of Cargo, the BFM is built with the FUTURA Harness which telescopes to your specific torso. The Futura harness and back panel adjusts to fit long and short torsos. Low-profile Mountain MOLLE panel on front for secure attachment of accessory pouches. Four zippers on main compartment allow for multiple access points to gear. Multiple drink tube exit ports – for routing tube over the shoulder or under an arm. Dedicated, insulated reservoir compartment (with reservoir hang loop). Features a 3L Mil Spec CRUX Reservoir, 47L Cargo Capacity, and is 100% free of BPA, BPS, and BPF for clean drinking. The dedicated, insulated reservoir compartment includes a reservoir hang loop.