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Both..Natural Brushes are best for powder products. Synthetic is best when working with creams or liquids.

It depends on the brand, but the ones from the link are synthetic

Some are natural and some synthetic. I've heard that synthetic brushes are better bc its easier to clean them.

Both. "Each frosted pink handled brush is handcrafted from top-quality natural and synthetic fibers."

You coulda just read the description, you know.

Synthetic. I wouldn't buy sephora brand since its not that good of quality. Instead check out http://www.sigmabeauty.com/