Hi Julia, Mammoth mattresses are marketed as a sports/health mattress.

Having tried a number of them I can confirm that they are 'high specification foam', but what does this mean.

It means its a quality foam, which all quality mattresses should be the John Ryan Contemporary range is all high specification foam/latex.

Mammoth use high density, firm, foams.

The mammoth construction uses a v- cut castellation, which is to cut and checkerboard the slab of foam to create different tensions in the mattress.

This allows the more closely scored sections to be more flexible and soft and the more distant scores to be firmer.

If you imagine a castellated piece of foam your close to the method.

It is an interesting technique but as for health benefits you would need to ask to see the clinical research behind this.

Latex on the other hand is the premium foam for mattresses and is incredibly progressive in its comfort, ie no need for castellations or cuts in the foam.

We have a range of contemporary mattresses that we believe can't be beat in terms of quality and price.

Lee (www.JohnRyanContemporary.co.uk)