This sleeve is designed to allow you to carry your laptop in the main compartment and the power cord and a mouse in the external slip in pocket. Laptop sleeves are made to zip around your laptop and prevent cosmetic damage such as scratches and dents. These are slim, form fitting, protective cases that offer some protection to computers while minimizing extra bulk. This sleeve, from Snoogg, is made of neoprene material, which is a synthetic rubber material. It is flexible, soft and water resistant. It is specifically designed for the thirteen inches laptop but can be used for the fourteen point five inches laptops too.