EVOC: High tech, back-free, ventilation optimised carry device for hydration and other essential needs on shorter rides. With enough space for a tube, some tools and an optional 1,5l hydration system it comes with a very dialled system that is an extra in comfort, that we call VENTIFLAP: increase the back distance for climbing and tighten it to the hip for the downhill, simply by pulling a string!• AIRFLOW CONTACT SYSTEM offers perfect back ventilation• VENTIFLAP for uphill- and downhill mode adjustment• 2 BOTTLE CARRIERS with extra safety fixation - easy to reachMaterial:  N 210D RIPSTOP HD, 3D AIR MESH, AIROFLEX3L, 430g, 28 x 18 x 8 cm