Lumbar support: Features extra deep zones to support your head whilst you sleep. Thermal properties: Designed to help keep you warm on a cold night and feeling fresh on a warm summer night. Pillow: Get a premium duck feather pillow. Deep filled: Natural soft duck feathers covered with 100% cotton fabric. Comfortable: The pillow’s fill zones mould to your head regardless of your sleeping position. Relaxing: Perfect for ensuring a great night’s sleep.