So the Artino RC-418BL Rain Coat is a decent purchase, rather good looking and even including a small reflex for dark nights. The material is a smooth plastic type which seems very sturdy and stretching it over even the plastic "feet" of the violin case have not made me worry about the plastic breaking.
The design is however lacking, leaving a huge area in the back completely uncovered, which might not be an issue if you are using it as a backpack, but if you only use the side handle this is a problem. Not to mention that the handle is actually completely covered..Minus points for ignoring this in the pictures.