The ABS® Vario line is the patented best-practice solution for the individual demands of freeriders, ski tourers and mountain guides. The twin system consists of the ABS® Base Unit with integrated ABS® TwinBag system and the Zip-Ons with packed volumes of 15, 18, 25, 30, 40 and 50 liters. Whatever your plans are – whether short, single- or multi-day tours, you are always reliably protected with the right backpack system.