The Wooster 7" Super Doo-Z 3/8" Nap Roller Cover is a high-quality roller cover that is suitable for smooth and semi-smooth surfaces. Its 3/8" nap makes it perfect for painting moderately textured surfaces such as walls and ceilings. Wooster's "Super Doo-Z" range is known for its superior paint pickup, smooth application, and durability. This roller cover provides efficient coverage and even distribution of paint, allowing you to produce professional-looking results with ease. It is a popular choice for both DIY enthusiasts and professional painters.