Among the standout features of the Derila Ergo Pillow is their flexible polyurethane foam core. This material conforms completely to the curves of your face and throat, giving individualized support that adjusts all through the night as you move. The polyurethane foam can be hypoallergenic, rendering it suitable for those who have allergies or sensitivities to dirt and different popular irritants. Unlike typical cushions that eliminate form with time, the Derila Ergo Pillow retains their stiffness and support, ensuring regular performance and longevity around weeks of everyday use. derila ergo pillow