Zone pocket coil system is designed according to the human body shape to match different support needs in certain areas: head, neck shoulders, hip, back and legs. With the Zone Pocket Coil System ideal spinal alignment is acheived. Provides flexibility and additional reinforcement within the core ensuring appropriate posture support while preventing the mattress from sagging. Individually wrapped pocket coils are designed to reduce sleep disturbances and gives your body essential comfort and support. Edge guard support prevents sagging and provides a very durable overall system with a reinforced mattress edge.