Characteristics of mosses

This page will teach you the essentials to understand the world of mosses.

In reality, the two most important variables in characterizing a foam are its density and its compression.

By understanding this, you will become a smart consumer and will be able to spot the competition's nonsense.

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Density

The density of a foam is synonymous with quality and durability

This measurement is expressed in lb/ft³ and represents the weight of a 1 ft³ block of foam. For example, if 1 ft³ weighs 1.8/lb; its density will be 1.8 lb/ft³.

The higher the density, the longer the foam will retain its initial properties and load-bearing capacity before softening or collapsing. However, it will cost more to produce. A denser foam therefore means quality and should last much longer.

Regular mousses

The density of regular foams used in industry is between
1.0 and 2.5 lb/ft³:
  • Low : 1.0 ― 1.1 ― 1.2 ― 1.3 ― 1.4
  • Average : 1.5 ― 1.7 ― 1.8
  • High : 2.1 ― 2.5

HR foams

HR foams have a density of 2.1 to 3.0 lb/ft³. HR foams are more elastic and generally have a better ability to return to their original shape than regular foams. They have the ability to return the pressure exerted by the body weight to return to their original position.
  • High : 2.1 ― 2.5 ― 3.0

Memory foams

Memory foams range in density from 1.5 to 8.0 lb/ft³. They are by far the most expensive foams to produce, but also the most comfortable on the market.
  • Average : 1.5 ― 2.5
  • High : 3.0 ― 4.0 ― 5.0 ― 6.0 ― 8.0

Compression

Compression indicates whether a foam is soft or firm.

This measurement, expressed in lb/50 in², gives the measurement of compression. It is obtained by calculating the weight required to compress the foam by 40% of its initial height.

The higher the compression index, the firmer the foam is said to be. It is also linked to density, because for a foam of a given density there are several possible compressions.

Regular mousses

The compression of regular foams used in industry is between 18 and 100 lbs/50 in².
  • Soft: 18 ― 27
  • Medium: 28 ― 30 ― 32 ― 35
  • Farm: 38 ― 40 ― 45
  • Very firm: 50 ― 55 ― 60 ― 70 ― 90 ― 100

HR foams

The compression of HR foams used in industry is between 19 and 75 lb/50in²,
  • Soft: 19 ― 23
  • Medium: 29 ― 35
  • Closed: 44
  • Very firm: 55 ― 75

Memory foams

The compression of memory foams used in the industry is between 10 and 14 lbs/50 in². This is the best type of foam for pressure relief, but it cannot be used alone, it must be combined with a support foam.
  • Very flexible: 10 ― 12 ― 13 ― 14