Free shipping and returns on MAC 'Studio Fix' Powder Plus Foundation at Nordstrom.com. Studio Fix Powder Plus Foundation is a one-step powder and foundation that gives your skin a smooth, flawless, all-matte finish with medium-to-full coverage. Its long-wearing, velvety texture allows your skin to breathe. Studio Fix is available in a wide range of colors.How to use: Apply to skin using a sponge or your desired brush, and blend. You can also blend with your fingertips.