* Dual spring system with 4000 responsive springs* Pillow top layer adds extra softness and comfort* Reinforced border increases usable sleep space* Available in Medium or Firm comfort levels This mattress is designed to respond to your body with precision, featuring a dual spring system made up of 1000 Ergo Zone7 pocket springs and 3000 Comfonomic micro springs. Together, they offer seven zones of support to ease pressure and adapt to your movements throughout the night. A generously filled pillow top adds an extra layer of softness for a more cushioned, cocoon-like sleep. The reinforced Ultra Edge Border gives you more space to stretch out while keeping you supported across the entire surface.