100% pure natural latex is made fro ma substance derived from rubber trees. The resin is whipped and then baked to form a long lasting, cushiony substance which is naturally renewable and inherently non-allergenic, anti-micobial, bacteria, moisture and dust mite resistant. Moulded into a cool and fresh, breathable pin core construction these pillows are durable and mold to support your neck while you sleep. They won't get that hollow spot due to the cushiony nature. They are also easy to wash and are protected with a zippered cover.