The Z Adventure R17 is a saddle bag designed to carry a large volume of items without the need for a rear rack Equipped with several durable self-adhesive straps and anti-tear material on its base, this bag attaches to the saddle rails and seat post for optimal weight distribution on the bicycle With a volume that can be adjusted from 8 to 17 liters, this bag is designed for cyclists travelling over long distances Equipped with reflective strips and an attachment loop for lights, the Z Adventure R17 is ideal for carrying light, large-sized items such as clothing The folding closure and waterproof fabric with heat-sealed interior can safely carry all the equipment needed for a tour Seatpost 24.4x9.4x7.8` 1037 c.i. Black/Red XXX-Large (700+ c.i.)