The spring unit is constructed using the classic Bonnell
hourglass shape. This ensures equal distribution of tension
throughout the entire spring unit, while each coil is doubleknotted,
top and bottom to increase strength and durability.
The durability that Medi+Spine build's into every mattress is your assurance of lasting value. We achieve this by using Relax Orthopaedic Comfort Foam inside our Healthy Spine Pillow Top mattress as well as Relax Orthopaedic Comfort Foam inside our quilt ensuring no indentations.