For environmental conscious freerides, the Arva Calgary 18 Reactor Backpack is The worlds first ever eco-designed avalanche airbag backpack. Avra overhauled their entire design process to create the first eco-designed avalanche airbag backpack made primarily with recycled fabrics. Lightweight, compact, and high-performance, the Calary 18 delivers on all accounts. Riders can carry up their skis of board with an A-frame design.