The Rivacase 5221 in blue is a slim protective sleeve designed for 13.3-inch laptops, including MacBook 13 and various Ultrabooks. It is crafted from 5 mm neoprene and polyester, which helps shield your device from dust, moisture, scratches, and accidental bumps during transport. Inside, the sleeve features an elastic material that holds the laptop securely in place, while a double zipper closure ensures everything stays tucked away. With external dimensions of 240 x 320 x 20 mm, this blue accessory fits easily into a larger bag or can be carried on its own, making it a practical choice for students or professionals who need a lightweight way to protect their computer.