*** Insist on ULTIMATE SLEEP BRAND Latex - Sold by Ultimate Sleep, Inc, creator of this listing - when you purchase *** This naturally hypoallergenic and anti-microbial latex mattress pad gives you the benefits of greater orthopedic support. It is made from 100% pure Natural White Latex (Dunlap Latex), our Ultimate Sleep mattress pads both ergonomic and eco-friendly. Medium Firm density latex is 5.3 lbs per cubic foot in density, and displays an ILD (Inflection Load Density) of 24 - 27 lbs. ILD is a measure of softness or firmness under loading; specifically, how much force is required to compress a sample by 25 percent of its height. This is our most popular density for those who looking for a natural alternative to a memory foam mattress. The Medium Firm has the softness of memory foam but also the firm support and naturalness that latex is famous for. This density is ideal for lighter body weights, and those who want more softness to their topper. PLEASE VISIT OUR AMAZON STORE TO SEE ALL OTHER SIZES, THICKNESSES, AND DENSITIES, AS WELL AS OTHER FOAM TOPPERS. Update - NO Restocking or Recycling Fees EVER, should you need to return this Latex Topper; and it DOES NOT have to be returned in "Brand New Condition" to secure your refund.