max coil bed No Further a Mystery
Hourglass coils, the most often used style, are available two kinds — Bonnell coils and offset coils. Based upon 19th century buggy seat springs, the Bonnell coil has an hourglass condition that has a knot at each stop, and is referred to as the first mattress coil. Now, Bonnell coils remain probably the most widespread coils in the mattress indu