The Sealy Posturepedic Plus Mount Auburn is a 13-inch innerspring mattress offering medium firmness, designed to provide balanced comfort and support for a wide range of sleepers. Available in California King size (72 inches wide by 83 inches long by 13 inches tall), this listing is for the mattress only, without a foundation, though a compatible foundation is available for separate purchase through Costco.

The mattress features a SupremeLoft™ Knit Cover with a Cool to Touch design that helps regulate sleeping temperature throughout the night. Its Zoned Support system is specifically engineered to target the lumbar region, promoting spinal alignment and pressure relief where it matters most. The DuraFlex™ Edge System reinforces the perimeter of the mattress, maximizing the usable sleep surface and making it easier to get in and out of bed. The innerspring construction delivers responsive, breathable support suited to back and stomach sleepers seeking a medium feel.

Purchased through Costco, this mattress includes White Glove delivery with in-home setup and haul-away of your old mattress at no additional cost. A 10-year manufacturer's warranty is included.