The Visco Therapy Pillows help relieve pain and sleep problems. Their unique design allows pressure relieving effects for the neck. The Visco elastic pressure relieving material is temperature sensitive. It responds to your body heat and weight by moulding into the natural shape of your head and aligning your spine perfectly. Visco Classic Pillows offer comfort and support to those who maybe suffering from back pain. Individually moulded and made with very high density visco elastic memory foam for maximum support and comfort. Specification ; Made from Visco Elastic Memory Foam by a CNC cutting machine Dry cleanable, zip off cover Orthopedic Ecological Sanitised Fabric Reacts to body heat Allergy Free 5 year warranty Made to British Standards