Leading the way in beds for over 140 years

Guide to Mattresses

In the not too distant past the core of the mattress was filled with many differing types of fillings, horse hair, flock, goose feathers, wool and even straw, these mattresses were then suspended on wooden or metal bedsteads usually with metal linked mesh.

Today we have a different approach to making mattresses and beds.

Probably the most important part of any mattress is its core. Its job is to absorb and support your body throughout the night in the most efficient way. In an average nights (8 hours) sleep it is believed that you twist and turn over 70 times, all that movement requires a system that’s not only strong, but flexible enough to keep you supported night after night, year after year.

Mattresses could be divided up into 3 main categories:


Open coil springs

Open Coil Springs are the most common type of spring used for mattresses in the UK. Often called the Bonnell spring the unit is made of high tensile wire that is cut using a highly sophisticated automated machine which, forms, knots and cuts the wire into the spring shape, this is then finished off by passing 7000 amps of electricity through it, which burns the carbon deposits within the steel wire which makes the spring, “springy”.

Mattress Bonnell Spring variations below:

A- head-diameter
B- height
C- wire thickness (gauge)
D- turns (4–7turns)
E- mid-diameter

Here at Airsprung we offer a number of options based upon the Bonnell system.