Cold foam
Thanks to the special high density HR foam layer, which extends from the centre of the pillow towards the sides, you get extra support. When you sleep on your back, you're more likely to sleep on the middle of the pillow.
Do you sleep on your side? Then you're more likely to sleep on the side of the pillow. This way you always have the right support so that your neck vertebra lies straight. In combination with the Matt mattress, this forms the ideal basis for the best sleeping comfort.