Wedge Sponge Latex-Based, Wedge-Shaped, Disposable Latex-based and wedge-shaped for professional-style application or blending of a variety of products. Disposable. These convenient, disposable latex wedges are used by most professional makeup artists. They are shaped to provide easy application of product to all parts of the face. The natural latex is formed into smooth surfaces for fine blending and more textured surfaces for feathering and general application.