What detail about the Powderpuff's coat increases the risk of tangles?

Answer

The undercoat can sometimes be longer than the outer coat

The soft, silky coat of the Powderpuff variety has a tendency to mat, a risk that is increased because the undercoat can sometimes grow longer than the outer coat.

What detail about the Powderpuff's coat increases the risk of tangles?
DoggroomingChinese Crested