Yes, they are wholesalers but they offer dropshipping services so still they can dropship their products for you.
Brand name clothing are often difficult to source even at wholesale. Many brand name owners protect their brands and limit distribution through channels approved by them only.
Most online suppliers (wholesale, dropship or liquidation) get their stocls from store returns, shelf pulls or overruns. But sometimes new merchandise can also be secured if you're lucky :)
Cheers!