Strategist Explains Our expert staff answers frequently asked questions in their areas of expertise and defines common terms so you can be a smarter shopper. Read more here . Photo-Illustration: The Strategist; Source Images Getty Over the past decade, more and more brands have started selling mattresses they say are specifically designed for heavy people or plus-size people. The concept can likely be traced to the launch of Big Fig — a mattress brand that caters explicitly to heavier customers