Vinal
I also found out as a mate of mine works for Ford, the new mustang has forward and back adjustable headrests and they will fit in the ford galaxy and s max that don’t have them.
Just I couldn’t get comfy in either but I could in the titanium x ( but that’s no longer on the scheme or I’d have gone for one of those as it’s a bit more practical space wise).
But 99% of the time the Tiguan is big enough.