Visco-elatic core
The HEFEL Visco-Classic pillow boasts a visco-elastic core that individually adjusts itself to the specific position of the head to ensure maximum pressure relief. Furthermore the pillow reacts to pressure and not to body warmth, so that it does not harden when cold. The HEFEL Visco-Classic pillow combines all the positive attributes of a neck support pillow whilst maintaining the classic pillow shape.