The Purple Harmony™ Pillow is the greatest pillow ever invented because it's the only pillow with innovative 360º Purple Grid™ Hex. Purple Grid Hex is made of incredibly durable, non toxic proprietary material, which means your pillow keeps its shape over night and over time. We tested more than 50 prototype combinations over the course of 1 ½ years to create the ideal balance of soft, cool, and responsive No Pressure® Support. Combined with the hypoallergenic Talalay Latex Core and a moisture-wicking cooling cover, the Harmony™ Pillow provides just the right amount of soft support your sleepy head has been dreaming about.