Zone3 have made a number of exciting changes to their transition backpack and it39s now packed full of new features making it extremely functional and more comfortable than ever holding a capacity of 40litre it is a particularly innovative design and much more than just a bag to carry kit in the backpack has been designed with three main compartments to help organise your race kit within each compartment there are itemised zipped pockets to help keep items separate and easy to find the b