Dimensions: 16.13" x 12.63" x 4.75". Reinforced contrasting black bottom and red decorative seam. Zipper closure on main compartment, cover compartment also secured with zipper. Additional exterior compartment in back, including two mesh outside pockets for bottles etc. Main compartment with padded notebook pocket, organizer inserts, key holder, and additional inner pocket. Adjustable carrying strap with shoulder pad. Large reflectors on cover tab. Nylon construction. Color: Gray. Bulk packed.