Spent all of your money on that nice, new 13- (or 15-) inch MacBook Pro and now you're looking for inexpensive protection for it? Look no further than this denim fabric laptop sleeve from ATailorBird (available from Amazon for just $14.99 -- affiliate link will compensate Apple World Today).
The slim design of the sleeve is classic, providing just enough protection for your MacBook Pro with padded sides and a fabric lining, and supplying a side zipped pocket to store the power adapter, cables, pens and of course all of those USB-C dongles you need...
The outside is made of a soft denim fabric in a grayish-tan color that doesn't attract attention to itself. The zippers practically disappear, yet are easily opened with amply-sized pulls.
For my own purposes, I needed something that was slender enough to fit into a pocket on a backpack that I use to carry all of my camera and tech gear, protecting the MacBook Pro from scratches from the iPads that it shares the pocket with. It worked perfectly, providing the extra bit of protection needed to keep the MacBook Pro safe in even the worst situations.
The quality of production of the sleeve from ATailorBird is surprisingly high considering the low cost, and it's a wonderful sidekick for the MacBook Pro. There's also a 15-inch size available for the larger MacBook Pro for $17.95.