Adoopted 2.2mm wire bonnell spring, Excellent pliablity, strong bounce performance. Be able to fiex separately according to body posture. Keeps the chine curve naturally. In dependence flexible spring doesn't inertere another sleeper. You can enjoy the tranquilty during sleeping. High class jacquard, brocade material combine with high density soft sponge. Soft and comfortable, independence thress lines desigh. Showing luxury in good taste.