Coat of Ceskoslovensky Vlcak

[Wolfsirius]

I have noticed, that there is lot of differences between coats in pictures at gallery. Example many Italian dog have very good coat (lot of)
What you Italian breeders do to your dogs to get that kind of coat?
I try to find answer on pedigrees, but is not there.
I also noticed that standard give a very much "free" for coat,

"Straight, close. Winter and summer coat differ greatly. In winter an immense undercoat together with the topcoat, forms a thick coat all over the body. It is necessary for the hair to cover the belly, the inside of the upper thigh, the scrotum, the inner part of the ears and the area between the toes. Well coated neck."

What kind of differ is between winter and summer coats in Italian dogs?

-Suski