Kristin Cavallari‘s haven doesn’t have any bras in it … or, at least her photo shoot for the Haven Collection doesn’t — ’cause her nipples are sticking right through her shirts in the ad.

The reality TV star and internet personality shared a series of photos to her Instagram Tuesday … wearing a ‘fit that left nothing to the imagination — ’cause it was clear she was feeling a bit chilly without a bra on.

She’s smoldering for the camera in these shots … staring right down the barrel with a ton of confidence — which ya gotta have a lot of to ditch the support.

The posts are an advertisement for the Haven Collection … a jewelry collection sold via the brand Uncommon James.

We gotta be honest … we don’t know how many people are tearing their eyes away from the rest of Kristin to focus on the jewelry — but, at least it’s in the pictures!

Cavallari’s newest pics come just a couple weeks after she flaunted her bod in a bunch of Stagecoach outfits … looking like a cowboy everyone would want to ride.