Designed to attach to the tie-down points on ALU-BOX Side Cases, this SW-Motech TraX Expansion Bag is constructed from 600-denier nylon with internal stiffeners and a zippered expansion panel that almost doubles its capacity from 8 to 14 liters. Includes a zippered compartment in the lid for small stuff, as well as an adjustable external shock cord lacing for stowing that extra fleece layer at hand. A removable internal dry liner attaches via hook-and-loop fasteners, eliminating the need for a rain cover. Measures 10 x 17 x 4–6 inches. Sold singly. Black.