How do fashion bloggers (models) get all those new clothes in pictures?

I followed quite a number of fashion bloggers who run the sites and model for the pictures. They’re definitely not one of those big time fashion bloggers who have connection with many name brands, but they still manage to get different nice outfits, clothes, and accessaries to model in the pictures. I doubt they actually spend their own money or can afford those fashion items. Is there some kind of way that you help to market a clothing company and in return you get to borrow their clothing to take pictures?