The minimalist cc 3l hydration pack with optimised back ventilation is as light as a feather and not only a big hit when it comes to tough stage races like the bc bike race through canada or various transalp challenges which is when it was developed by our team riders in fact its prime characteristic is the hydration system which is perfect for all kinds of dry spells air tune system the lightest back system for our lightest backpacks the air tune system offers minimal contact surface