The Sealy Posturepedic Acier Firm is a 13" firm mattress designed for targeted support and cooling comfort. It features a breathable cover with Surface-Guard Technology™ and MoistureProtect™, quilted with 2" x 0.5" SealyComfort™ Foam** for a light cushioning feel. At the center, 0.5" SealyComfort™ Gel Foam and 1.5" SealySupport™ Gel Foam Firm deliver reinforced, firm support and pressure relief. The Posturepedic® Support System with 736 individually wrapped PrecisionFit™ coils (Queen) provides responsive support and reduced motion transfer, while the Coil Edge system ensures edge-to-edge stability. A 1" base foam layer adds lasting durability, making this mattress ideal for back and stomach sleepers who prefer a cooler, firmer sleep surface.