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This is basically a foundation base that claims to control oil and make the application of the follow mineral foundation much more easy...I can`t say about this last thing because the lady at Sephora has applied this for me...but maybe for the final result in terms of staying of the foundation is good.
I`m not a huge fan of bareMinerals but they still attract me very much. I`m not crazy about the loose powder because they are very annoying to use but also because one me they seams to excentuate the fine lines and this primer didn`t do any spectacular in this terms. I can`t say about the control of the oil because I wore it just for few hours.
From the Sephora website they said that it`s good for combination and oily skin and that it has calcium silicate for more control and polished effect of extracts of aloe vera and chamomile to better prepare the skin.
* photo is not mine source below