A question on branding?

So 20 yards of linen = 1 coat is fine and all but it got me thinking why do branded clothes cost so much like a Gucci coat or purse costs 10000 dollars or something like that

I'm still on chapter 1 of kapital but is my understanding correct that the value represents the congealed mass of various other types of labor I e patenting/trademark cost of lawyers, advertising etc etc or am I off the mark