The compressible design allows for convenient travel or use as a neck roll pillow, ideal for flights, cars, or buses. The convenient size allows for easy transportation but can still be used as a traditional sleeping pillow, perfect for hotels or when staying as a guest. The liquid Z™ Gel lies on top of the pillow for a cool sleeping surface that will capture and dissipate your body heat, creating a cooler night's sleep. The memory foam is also infused with Z™ Gel for a combination that offers an optimal thermal experience. The unique Gel Dough® memory formula creates a softer, cooler, doughier memory foam. The extremely breathable bamboo velour cover enhances the cooling effect, and is removable for easy laundering.