Check the listing for details. Arva Reactor 18 Pack (No Airbag). Condition: Used. Listed at 100.00 USD. The Arva Reactor 18 Airbag Backpack is a smaller backcountry backpack that's perfect for speedier missions. The pack itself has everything you need for some quick powder laps. A separate compartment for your shovel and probe means you can easily access them in an emergency without having to root around in the pack, and a ski, snowboard, and ice axe carry ensure you're always equipped for bootpacks up steep couloirs. Even though the pack itself isn't that large, Arva equipped the shoulder straps, waist belt, and back panel with plush foam for comfortable carrying as you sniff out the fresh. The Arva Airbag System (must buy separately) is removable and can be paired with other ARVA Reactor packs NOTE: I am not selling the Airbag System. Just the backpack