This spine vpd hydration pack does it all combining the superior vpd back protector with a hydration pack so you have instant hands free hydration while staying protected if you fall off the back protector offers flexible comfortable protection and it works progressively to adapt itself to the force of the impact the back protector in this hydration pack has been tested according to the highest level of the 1621 2 motorcyle standard and it39s completely removable so you can use it as a