Leaden with hard core.

A good Viskokissen I imagine otherwise.
I bought a parallel Viskomatratze. This was really pleasant, soft and "empathy"
The only advantage of the pillow where you lay it, because it remains (due to high weight) are also.
In other reviews recommend herauszulüsen the core. To this end, the pillow should be separated
and re-sewn, it has no zipper.