The cover does not zip off, but this item is machine washable.
Just like the previous person stated, no zip off cover, but I've cleaned my xl sized one in the washing machine just fine.
Another thing to be noted, West Paw beds tend to run a size small. I have this bed and two of their bolster beds. Sized up to xl after I'd ordered my first bolster bed for my 78lbs dog. The size large was too small. Sized up with this bed too, the xl is the perfect size.