Mattress MegaStore in Hillsboro, Milwaukie and Beaverton, OR is a locally owned and operated mattress retailer with a simple philosophy. OR is proud to offer specialty bedding including Serta mattresses such as the iComfort Sleep System, iSeries Hybrid Sleep System and Perfect Sleeper Elite. Widely recognized as the premier mattress manufacturer in the industry, Serta continues to innovate and create new mattress technology. Let us help you pick the Serta mattress that meets your personal preferences and physical needs. Whether you favor a firm mattress or a soft mattress, there are many factors relevant to ensuring maximum comfort.