The new Black Diamond Jetforce Booster 25-liter fits with the new Jetforce Pro system. Jetforce booster allows you to increase or decrease the volume of your Jetforce Pro bag. 25-liter technically and it allows you to have outings for long days in the off-piste. It features a dedicated pocket for your avalanche equipment. The bag is spacious enough for you to have several layers of clothing, water bottle and other necessary gear with.