Serta Mattress - The Largest selection of Serta Mattresses in Northern California - Makers of the Perfect Sleeper. For more than 70 years, the Perfect Sleeper has stood for comfort and value and now Serta PerfectStart mattresses feature luxury quality for those seeking detail crafted sleep. With FireBlocker technology and the a supportive innerspring, Serta builds mattresses for safety, durability and value.