The weatherproof MW X C Mars Project Folio adds capacity and organization by easily attaching to the ArkivA(R) rails on the front. The Folio includes four custom logo orange Arkiv buckles and is made from the same Ultra 400 shell and EPX 70 liner as the Mars pack. The Folio features a magnetic closure, zippered pockets, pen slots and an extra Arkiv rail. Easily removable for separate transport. A U-lock slot in the back can double as a handle when the Folio is used as a stand-alone bag.Made in the USA External Dimensions : 12" x 10" x 2.25"Measures (Internal) : 12" x 9" x 2"Weight : 1.1 lbs.