BackJoy SleepSound Pillow, Patented Technology, Cool Comfort Memory Foam Layers, Reduces Neck Pain, Travel Pillow For All Transportation Polyester Imported Combines the benefits of memory foam support and the comfort of down Patented design self-adjusts to support optimal sleeping posture Unique, layered construction works for back or side sleepers Compresses to fit easily into a suitcase or travel bag Hypoallergenic