Back Supporter mattress features a 9” Lumbar Zoned and Tempered Power Coil. The first ever one-sided coil designed for a one-sided mattress. The zoned coil shape provides comfort on top, support in the center of the coil and motion stability on the bottom of the coil. Plus, the entire Power Coil is tempered and zoned to provide lumbar support. The Edge support that they use let the mattress bend so it can be put into tighter spaces.
Four Seasons Uses individually wrapped coil called Active Coil and was designed for one sided mattresses. This level of spring air uses better foams than the backsupporter line.
Natures Rest A talalay latex mattress using I core holes for couples with different shapes or weights will also work with similar couples
Chatham and Wells Uses a dual coil system called PIP(pocked coil inside a pocked coil) and high grade foams,latex memory foam,cashmere and silk covers. This mattress is amongst the most elegant
You will find terms and conditions on Mattress Information home page