The memory foam comes along with holes through the entire pillow, which provide ventilation. Solid memory foam pillows are generally speaking the least breathable class of pillows, Therefore the ventilation is meant to deal with that situation. There is not any sturdy relationship in my thoughts between the pillows https://kameronhryeh.ampblogs.com/5-simple-statements-about-zenfluff-best-memory-foam-pillow-explained-67748673