Features of the Black Diamond PIEPS Jetforce BT 35 Pack Redesigned JetForce Technology is smaller, lighter and repositioned for better carrying capabilities JetForce Technology is built in rechargeable, travel-friendly and extremely durable Bluetooth connectivity allows for easy softwAre and system updates with a Smartphone Dedicated avy tools pocket and single ice axe attachment Tuck-away diagonal ski carry allows Airbag to deploy while skis Are attached HiLo helmet holder, hipbelt stash pocket and internal accessory pocket Redesigned leg strap is retractable with easy-to-use carabiner clip for quick attachment 25-Liter Split pack has straps for splitBoard carry3