A padded carrying case for a 15.6 in laptop, with a detachable shoulder strap for the days you would rather not hold anything.
The shell is water resistant and padded on every face, which covers what actually happens to a laptop in transit: dust, knocks against a doorframe, a scrape in an overhead locker, a scratch from keys in the same bag, and the coffee that gets away from someone on the train.
A sleeve on the back slides over the handle of a wheeled case, so the bag rides on the suitcase through an airport instead of pulling on your shoulder. Multi-functional enough to take a charger, a notebook and a folder alongside the machine.
