"Today PCSTATS is looking at three other types of Waterfield Design bags; a piggyback case for hauling gear, a neoprene-padded horizontal notebook sleeve and a vertical notebook SleeveCase with a shoulder strap - especially good for airports. A notebook sleeve is best described as an outer covering to protect the laptop from wear and tear while it's inside another bag. Notebooks are inherently fragile things, even with the adoption of magnesium alloys, carbon fiber, and titanium chassis. By their nature, portability puts notebooks in the path of a fair bit of rough handling where the forces of friction usually end up winning on fancy surfaces."