This "Topper" we have the perfect bed.

Our bed 140x 200cm. We weigh about 170kg. Both over 50 years. Light scoliosis of a, herniated discs the other.
Shoulder problems both and various other Gelenkzipperlein. Long lie or good sleep was no longer possible. Several mattresses and grates brought no improvement. We have the rest for 8 weeks.
Delivery fast, packaging very large.
Edition tried: First extremely skeptical unusual material but great respect. After the first night we both brisk amazing. After eight weeks: restful sleep, symptoms almost disappeared in the morning. I can even back to sleep on one side, where I could no longer lie for a few years! Due to this edition is sleeping like a therapy!