I use Biogroom Mink oil spray.
I spray a little on after bath while coat is still wet.
Then I comb Jack's hair gently.
I am lucky he hardly ever mats. I brush him twice a day.
So this helps keep coat mat free.
Also, the Mink oil spray is oily so you only need very little.
I found that if you use too much, they end up looking greasy after a few days.
I love the stuff....Jack's coat is gorgeous because of this product..
Heres a picture of his coat...Nice high polished look...not greasy.