Different days in the backcountry call for different amounts of gear, luckily ARVA has the adaptable ARVA Reactor Pro Flex Bundle (18L+32L) in theirrepertoire. This combo pack combines an 18L avalanche airbag pack with a removable 32L attachment that easily clicks on. On short missions where it isneeded to ski hard, trust the small pack that holds an airbag, snacks, and all avalanche tools. When youneed to go deeper in the backcountry and bring extra layers, first aid kits, or a camera, clip on the extra pack and head out with confidence.