- The Twins Convertible Backpack is an ideal way to carry all your training gear. The BAG-5 easily converts from an over-sized backpack to duffel bag with stow-able straps. The backpack size is 40 x 60 x 30 cm, increasing to 40 x 80 x 30 cm when extended to a duffel bag.
Made of high-quality and durable nylons satin, it is both tough and colorful. There are several pockets and compartments of various sizes; perfect for all your gear big and small. Strong, reinforced seams & zippers.