The Arva Switch Extreme Bundle pairs one Reactor 2. 0 airbag system with two swappable pack covers, the 24-liter Ride24 and the 40-liter Explore40. A rider clips the same mechanical, battery-free dual-airbag system into whichever cover fits the day, from a quick resort lap to a full backcountry tour. Both covers and the shared frame use recycled polyamide and polyester construction. The bundle gives a rider one avalanche safety system instead of two. What Our Gearhead(R) Experts Are Saying:"I pull the Ride24 off in the morning for inbounds laps and click the Explore40 on that same afternoon when a tour opens up. The airbag system never leaves its mount, so the swap takes less time than clipping into a pair of skis."