The Eberlestock J2DB Zip-On Dry Bag is an ultralight (12 oz.), 4000 cubic inch dry bag, and is the perfect complement to your F1 Mainframe Pack or your M1 Carrier Frame Pack.
Use the J2DB Zip-On with your F1 Mainframe or the M1 Carrier Frame to instantly convert it to the most capable ultralight, high-volume backpack in the world. The J2DB Zip-On gives you storage space, secured by a roll-top and taped seams. This is a great lightweight option to keep your gear dry. Dimensions: 30"H x 13"W x 13"D (76.2 cm x 33.02 cm x 33.02 cm)