"Severe matting" refers to hair that is tangled, matted, and difficult to comb or brush through.
Sentences with «severe matting»
The dog was missing patches of fur and had severe mats over her entire body. (svaca.com)
Remember, not all cats will take to grooming, especially in the winter if they're feeling more sensitive or have particularly severe mats. (cattime.com)
He had long been neglected and had severe mats all over his body. (saukhumane.org)