Think Tank Photo Backpack Conversion Straps(formerly Shoulder Harness V2.0)
Amazon.com: Backpack Carrying System with Adjustable Strap – ideal for carrying small to medium size hard shell case/hand baggage. : Electronics
Wheeled Carry On backpack carrying system: Mystery Ranch Load Sling vs Explorer Case Backpack Carrying System vs RucPac Hardcase Strap vs Baggex Store Backpack Conversion System Strap : r/ManyBaggers
H170 and H175 — Holster as a Backpack Strap Adapter – Kinesis & eoGEAR
Backpack Conversion Straps - Think Tank Photo - YouTube