What is the primary function of the longer, harsher outer coat on a Spitz dog?

Answer

To repel water and dirt

The double coat is key to the Spitz type; the soft, dense undercoat provides warmth, while the longer, harsher outer coat serves the practical purpose of repelling water and dirt.

What is the primary function of the longer, harsher outer coat on a Spitz dog?
Dogbreedspitz