Stockbridge Firm Double Sided mattress from Mattress Express. Featuring 416 foam encased coils, this mattress provides superior support and edge stability for a restful night's sleep. Each side is cushioned with 1.5 inches of firm poly foam, ensuring lasting durability and firmness. With its anti-sag filler strip, you can trust in consistent comfort and longevity. Sleep soundly knowing you've invested in quality and support with Mattress Express.