100% Natural Latex Mattress Topper - Reversible with 2 Firmnesses, Full. Made with State-of-the-Art Continuous Pour TechnologyOur latex topper is made in the United States with the world’s first patent pending double pouring continuous line. Latex is a white, milky liquid, a stable dispersion of rubber particles (organic polymer particles) in water. Natural latex is the sap of the tropical rubber tree "Hevea brasiliensis" which is grown in plantations in South East Asia (Thailand, Malaysia, Vietnam and Indonesia), parts of Africa (Cameroon) and South America (Brazil). eluxurySupply guarantees the use of high-quality natural latex from plantations selected, controlled and carefully tested for use in the production process.eLuxurySupply attaches great importance to the use of natural latex. This not only contributes to a unique elasticity and flexibility of the final product, but also a sustainable and ecological production.The process for creating this topper begins with the foaming and pouring process, where a mixture of latex, soap and vulcanizing agents are combined. The mixture is then "foamed" by adding compressed air to the compound. The foam is deposited onto the continuous line which has pins necessary for the steam vulcanization process. So buy this 100% Natural Latex Mattress Topper (Reversible) for $175.99 - $234.99 with free shipping at Rakuten.com.