Memory Foam Pillow King Size: A king-sized pillow with memory foam technology is referred to as a king-size memory foam pillow. Memory foam pillows have excellent air permeability and moisture absorption. It is often designed as a porous structure that is efficiently circulated and ventilated, keeping the pillow dry and clean.King-sized pillows typically offer more surface area and comfort than standard or queen-size cushions. Because the pillow is made of memory foam, it is molded to the user's head and neck, encouraging perfect alignment and relieving pressure spots while sleeping. These pillows are particularly popular with people who enjoy the extra room and improved support that a larger pillow provides.