The cover on my ARB is (or is very similar to) Hypalon. It's really pretty tough stuff. The zipper on the cover failed long before the cover and I procured and purchased a new cover (with improved zipper) from Kurt easily and for a reasonable price. I'm sure the maggiolina would be tougher, but for the extra cost, I can replace my cover a few times, but I doubt I'll ever have to again.
'73 FJ40 - '85 FJ60 - '05 Tundra