The Sealy Wild Canyon Firm mattress is built around SealyStability™ encased coils that react independently to deliver targeted support and minimize motion transfer. The CoreSupport™ center reinforces the heaviest parts of the body with memory foam, reducing sagging and supporting long-term durability. The StableEdge™ Pro system strengthens the perimeter so the full sleep surface remains stable and usable. A soft knit cover with MoistureProtect™ wicks away moisture to promote a cooler, fresher sleep environment.