backcountry backpack with airbag and ergonomic fit . the a.light tour is a versatile ski touring backpack with avalanche airbag for use in the backcountry. with its ergonomic fit, the backpack sits close to the body and distributes weight comfortably without weighing you down or restricting your freedom of movement.the release handle is height- and side-adjustable and thus perfectly adaptable to your needs. the abs twinbags is a unique airbag system with two independent airbags with a volume-optimised shape. of course, this backpack comes with all the features that a backcountry backpack must have.abs® zipon systemthe patented zipon system allows the size to be expanded from 25-30 l to 35-40 l. with its sophisticated design, the a.light tour has been developed for the different needs of tourers - from beginners to ambitious tourers looking for a challenge in technical terrain.cartridge and trigger unit are not included in the scope of delivery.