Dakine Backpack ABS signal Dakine avalanche backpack, model ABS Signal 25. The backpack has an Avalanche ABS avalanche system that is stored in the back of the backpack. The avalanche system includes two inflatable cushions, a nitrogen-filled bottle, a bottle-tightening valve, a pneumatic pull rod, and a trigger for firing the bottle. The handrail is located on the left strap, making it quick and easy to use. The moment you pull the handrail, the pillow is over a few