This is one of real technique's best brushes imo. It's works so well for so many things. As the name suggests, its good to blending out and applying contour. Its also dense enough for liquid foundation, and works for blush. Its also very soft and easy to clean, like the other real techniques brushes.

One of the best affordable brushes on the market.
Great brush head makes blending easy. Easy to clean. Affordable and readily available.

I absolutely LOVE this brush. I have been using an expensive high end contour brush thats okish. But then after hearing great things about this brand I took the plunge and gave them a go. I love how comfortable, light the handle is and the bristles are so soft, super dense while still flexible. It blends my contour products beautifully. I plan to buy more brushes from them :)