California.camping.de seat covers

[JohnCalifornia]

Hi, my Cali came with some seat covers already fitted. On the label it says California.camping. de. They are very good quality that seem half leather (probably pleather)and alacantara in the middle. I didn’t even know they were seat covers as they fit so perfect, the previous owner told me they were seat covers. Anyway I want to remove them to put them in the washer then re fit. I’m sure this won’t be an easy job as they are fitted so well. Has anyone else got these fitted and can they be put in the washing machine?
Thanks for any replies