The Altura Arran 2 Expanding Postpack is a larger style post pack with the ability to expand. It is designed to adapt to all commuting or touring needs. The KLICKfix™ Contour Adapt System makes taking the postpack on and off quick and easy when in a rush. Altura Arran 2 Expanding Postpack Features KLICKfix™ Quick Release Contour System Zip away main compartment expansion 2 external zipped pockets Grab handle Light attachment points Elasticated cord, external storage Strategically located reflective trims for increased visibility