The Screensleeve is designed to fit snugly over the screen. Frequent finger contact with the keyboard accumulates skin oils and grease, often transfers to your screen each time you close your computer. Made of durable, high quality Ultrasuede, the Screensleeve protects and reduces damage to MacBooks screen panel while packed in carrying cases.When closed, any pressure placed on the top of the computer screen panel can leave an imprint or scratch on the screen's surface. Over time, these blemishes become difficult from your computer screen.