Nelson-Rigg CTB-250 RiggPak Black Expandable Roll Bag Made from top quality UV-treated Tri-Max ballistic nylon, the bag uses a plastic stiffener to hold the bags shape even when empty and highly reflective webbing helps enhance safety for night riding Features expandable ends for when more room is needed, heavy-duty zippers with pull fobs for use with or without gloves, and side pockets easily store maps, keys, money When mounted to a backrest or sissybar, bag is to sit on either luggage rack or passenger seat, attaches using the unique Full-Nelson mounting system Includes waterproof rain cover and an adjustable carrying strap for easy transportation off your bike Main compartment measures: 13 inch length x 9 inch diameter/18 inch length x 9 inch width expanded and holds 17.26 liters/26.55 liters expanded