What Does the “+10” Mean in Those Deuter Backpacks?

https://outdoorsfaqs.com/what-does-the-10-mean-in-those-deuter-backpacks/
In short, the “+10” in those Deuter backpacks mean extra volume in liters, which you have with an extendable collar. In their smaller packs you will see +5 and in the largest +15. This is a feature that you have only in their classic designs with a collar and lid.

More about the products shown here you can see by following the links below:
Deuter Packs: https://amzn.to/3tMvGNL
Deuter Aircontact Ultra 45+5L SL Women’s Fit Hiking Backpack: https://amzn.to/3GvtIbW
Deuter Aircontact PRO 70 + 15: https://amzn.to/3Ved6tI

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