The Adjustable Backpack B3 is a small, medium and large backpack all in one. Using the same adjusting mechanism as our classic A10, B3 has the ability to transition between 31L, 46.5L, and a 62L capacities, making it the only backpack you need. There is no other backpack in the world with this size versatility.
Focusing on being a great overall backpack, B3 is equipped with great features such as being water resistant, durable, having a removable waist belt and side compression straps. Following Piorama's design integrity, B3 redefines simplicity and functionality.