Aircontact Lite: Vari Quick | Deuter Aircontact Lite series has adjustable harness at the back to adjust the torso size from 15 to 20 inches. We call it Vari quick system. Note
The deuter Kid Comfort series
Deuter Aircontact Lite 65+10 Backpack | Campman
Deuter Vari Quick Fox 30 camping and hiking backpack for Sale in Chicago, IL - OfferUp