Not exact matches
While the
number of coils does somewhat reflect on the density
of the mattress, many other factors come into play as
well.
The firmness
of these mattresses depends not only on the
number of coils, but also the wire gauge as
well as the
number of turns in each
coil.
Manufacturers equate the
number of coils and gauge
of the wire in an innerspring mattress with overall firmness; it's a
good idea to look for mattresses with a minimum
of 135
coils and a gauge
of 15.5 or lower (packaging, a user manual, or online descriptions should spell this out).
For innerspring mattresses, higher
numbers of coils (generally above 150) are
better and result in a firmer mattress.
The damper's fluid viscosity has been enhanced and the
number of active
coils has also gone up, giving it the added height benefit and, theoretically at least, also
better spring load capacity.