Often compared to pound cake, natural Dunlop latex foam has been made the same way since the 1920s. Although processing methods have advanced, this is foam rubber made the way it used to be, before synthetic (and toxic) chemicals were substituted for natural rubber serum. Dunlop is the densest natural latex, and is available in a range of firmnesses.
Dunlop latex is made from pure latex serum, or sap, which is tapped from beneath the bark of the rubber tree. The sap is harvested, whipped into a froth, then baked into sheets in huge steam molds. Natural sediments in the mixture settle to the bottom of the mold, making Dunlop layers a bit denser on the bottom side. (This means you can fine-tune a layer’s firmness simply by flipping it over.) Dunlop is comfortable, durable, and can provide both softness AND support.
In Savvy Rest’s customizable organic mattresses, Savvy Rest uses Dunlop latex from a supplier that has gone extra miles to have not only its rubber tree growing but also latex processing certified organic. Their farms have been certified organic according to the USDA’s National Organic Program standards by the Control Union, an international certifying authority. Their natural Dunlop latex also meets the GOLS (Global Organic Latex) standard. And their labor practices have been audited for fair-trade standards by Intertek.