Active Comfort Fit with Load adjustment straps and Round profile frame made of permanently elastic spring steel.
 
Stretch side pockets
Adjustable sternum belt
Compatible with 3.0 liter drinking system/bag
Rain Cover
Inside compartment to keep your valuables safe
Walking pole holder
Elasticated inner compartment for storing wet/sweaty clothing, water reservoir, etc.
Front zip access
snug hip fins
Pull-forward hip fins
Lid compartment
Aircomfort System
PFC free and 50% recycled