40L Size:50X25X26cm / 20X10X10.5inch (LxWxH) 
40L weight :1.3KG

60L Size:58X30X30cm / 23X12X12 inch(LxWxH)
60L weight :1.5KG

80L Size:68*36*34cm / 26X14X13 inch(LxWxH)
80L weight :1.7KG

"Large rectangular-shaped duffel bag with roomy interior ideal for travel or storage

Made of  600D polyester; lightweight, yet durable; strong weight capacity.

Zippered interior pocket and exterior pocket for quick access to smaller items like keys or tickets

Durable zipper closure; top loop handles for easily lifting and carrying; collapsible for simple storing

Size: 18.8*10*7.8inches (LxWxH)

The general shape is luggage based, but some subtle curves have been added which let the pack open and close easy also delivering a comfy ride in shoulder or backpack mode.

On that note, there are 3 main modes of carry: Main handle in the middle, Optional shoulder strap, or Integrated Backpack straps.

The middle handle is nice and beefy with foam around it for comfort. This won't be the most used method, but is good for quick pick up and go action.I like how it is just in the middle and doesn't prevent access to the bag. The included shoulder strap is based on what usually gives which is pretty good. 2"" webbing with plastic snap hooks and a pad that attaches with velcro straps. There are D-rings on each corner of the pack for a total of 4 to allow you to get creative with shoulder strap connection."