The next evolution of our innovative JetForce Technology, the PIEPS Jetforce BT avalanche airbag system is now smaller and lighter and features Bluetooth capabilities for easy updates. The 35-liter pack is spacious, designed for snow-safety professionals and backcountry travelers that demand plenty of storage, plus the entire system is modular, giving you the ability to attach a 10-liter, 25-liter, or 25-liter splitboard booster pack to the JetForce Pro system-making this airbag pack extremely versatile while adding a margin of safety in the backcountry.