What it is: A set featuring an award-winning brush-cleaning mat and a kabuki foundation brush. What it does: The Sigma Spa Express Brush Cleaning Mat deep cleans all makeup brushes, ridding them of dirt, oil and residue. The 3DHD Kabuki is a foundation brush unlike any before, with angles and edges designed to reach every curve of the face to apply concealer, contour and foundation and blend it all seamlessly. Duo includes:- Sigma Spa Express Brush Cleaning Mat- 3DHD Kabuki Foundation Brush- Bonus sample SigMagic BrushshampooHow to use: Use the mat with mild soap or the brush-cleaning solution and rinse with warm water. Brand: Sigma. Style Name: Sigma Beauty Innovation Duo ($50 Value). Style Number: 5369344. Available in stores.