Combines luxurious natural fibres and proven technology to provide the ultimate in luxury and temperature control. The moulded core contains a unique formulation for head and neck support. Ventilation allows air flow and breathability while gel particles help to provide temperature management. The natural fibres of the wool and silk blend surround help to regulate temperature, keeping you warmer in winter and cooler in summer. The tencel case provides a fresh and cool sleeping surface due to the moisture wicking properties and is more absorbent than cotton. Great for side sleepers.