Spectrum All About the Brush D01 The Base Duo. The essential two-piece collection for building a seamless and high-definition foundation and concealer base.. Give your base makeup the professional finish it deserves. We believe that great complexion products start with great tools, which is why we’ve expertly selected this high-performance duo. The Spectrum Base Duo provides the fundamental brushes you need to effortlessly blend liquid and cream formulas, guaranteeing a seamless, streak-free canvas every single time. It’s the easiest way to elevate your everyday makeup look.. Perfect for the makeup minimalist or anyone who demands flawless base coverage. This set is designed to tackle the two most crucial steps of your routine. Use the larger, densely packed foundation brush to quickly apply and buff your liquid or cream foundation onto the whole face. Then, take the smaller, domed precision concealer brush to target and brighten difficult areas like under the eyes, ensuring every spot is seamlessly blended for a perfected finish.. Why We Love It. This is the ultimate dream team for foundation and concealer! We love that Spectrum has stripped it back to the essentials, giving you two perfectly shaped, highly effective tools that tackle the most common blending struggles. The small brush, in particular, makes brightening and perfecting the under-eye area so much easier than using your fingers—it's instant, professional-level precision.. Values. Vegan. Cruelty-Free. High-Quality Synthetic Bristles. 2-Piece Essential Set. Ideal for Liquid & Cream Formulas. This duo is the cornerstone of any makeup bag, offering speed, precision, and a flawless finish you can rely on.