Smashbox Photo Finish Primer
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This is a product that is already in my beauty arsenal. It's something I use daily and is one of the best primers out there in my opinion.
This primer helps blur the appearance of pores, smoothes the skin so you get a more even application of your makeup, and helps your makeup last longer.
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If you have a certain skin concern, you can check out the other primers in their line, as they have several and each one caters to a certain concern. This one, however, is great for every skin type. I recommend this if you're just getting to know makeup and your skin.
You can get the travel size (.5oz) for $16 or the full size (1oz) for $36.