In the past, I use to just carry it with the lid open, just like it is when sitting my desk. But now that I no longer use a case, I'm trying to be extra cautious so I can avoid dings, dents, and scratches as much as possible. I have a couple sleeves but honestly, I don't think I really need them. I think as long as you close the lid, and carry it wherever you're going it should be fine. In the car just keep it on the seat and be careful overall. I think there are some general guidelines people should follow and this can be one of them. The other one is never keep a glass of juice near your MBPr. Always far enough to where if it spilled, it wouldn't fall on your notebook.