Serenia Sleep Dunlop Latex 2-Inch Easy Flip Mattress Pad Topper with Cover, King Natural latex is manufactured from the sap of rubber trees. Latex ILD is 16 - 20 providing a soft but supportive feel Easy Spot clean with warm water; do not put topper in the washing machine or dryer. The latex core of this topper has air ventilation holes which helps dissipate body heat for a fresh and dry comfortable sleep. Latex is hypo-allergenic, dust mite resistant, and very durable.