Sierra Sleep by Ashley - 11" Memory Foam and Gel Mattress - King Size - Traditional - White MyGel memory foam from Sierra Sleep offers the highest level of contouring support and pressure relief with the cooling comfort of gel Active charcoal and green tea extract are infused into MyGel to eliminate odors and keep your mattress fresh Featuring a Luxurious knit cover, 3.5-inch MyGel foam, 1-inch reticulated high density foam, 6.5 high density fresh air foam. Mattress is compressed and boxed for easy shipping; warranty information supplied in the box Established in 1945, Ashley offers one of the industrys broadest product assortments to retail partners in 123 countries. In less than 10 years, Ashley Furniture has become the No. 1 selling furniture store brand in the world and the No. 1 retailer of furniture and bedding in the United States.