Extreme Sleeve for Laptop 11" (Black) Flexible Lightweight Water-Resistant Reactive Protection Technology (RPT) - a composite blend of PORON XRD material and proprietary G-Form materials and technology Suitable for all 11 inch laptops, netbook, notebook: Apple Macbook pro, Apple macbook air, Acer, Hewlett-Packard (HP), Dell, Lenovo, Panasonic, Samsung, and Toshiba