Dunlop Ventilated Natural Latex Pillow with Invisible Zipped Inner Cover(Firm) Cushion firm latex pillow. Made with 100% all natural latex foam. Ventilated design maintains sleeping temperature. Latex pillow is 4 inches tall; hi-loft design is ideal for side and back sleepers. Latex is made made from the sap of rubber trees, the material is all natural, sustainable and safe for the home. Latex allows for proper spinal alignment during sleep. 10 Years on all foam pillows.