Avenco: HYBRID DESIGN DRIVES THE PERFORMANCE: Avenco king size mattress combines the pocket innersprings with the cooling gel memory foam for powerful targeted support, perfectly balanced to relieve back and neck pain. COMFORTABLE AND BREATHABLE SURFACE: A breathable knitted fabric cover encases the king hybrid mattress which is soft and skin-friendly.KEEP COOL ALL NIGHT LONG: Cooling infusions in the foam layers and steady air circulation throughout the coil layer help the king mattress maintain a comfortable temperature. MOTION ISOLATION AND SUPPORT: The individually pocket coils of the king size mattress provide enough support for the correct natural alignment of the spine and balance body pressure.