Use tail Bag separatley or with saddlebags as a single unit. Durable 1680 Denier ballistic nylon construction with scotchlite 3M reflective striping and soft tricot interior lining. Designed with easy access top loading main compartment, and top flap internal organizer pocket. Built-in bungee cord hook provide secure release buckles for Cortech Sport Saddlebag attachment. Shoulder strap and raincover included. Tail Bag measures 8.5''H x 15''Wx 13''L(expands to 19''W).