What it is: A nylon-bristle brush for applying liquid foundation. What it does: HD Brush #25N’s medium-size, smooth bristles distribute the perfect amount of product to leave the skin looking completely flawless. Its unique size and shape are ideal for quickly and precisely covering large areas. What else you need to know: HD Brush #25N is the perfect tool for applying HD Invisible Cover Foundation. Sephora is the exclusive beauty retailer for this product.