Stiffness
Stiffness - Compression stockings
The resting pressure is currently used to describe the compression strength. The compression classes only describe the respective pressure under rest conditions.
The pressure only increases when the muscles are activated while walking.1
This working pressure is determined by the material used, which can differ in terms of elasticity and stretchability as well as the weight per unit area (Stiffness).
For this reason, there are medical compression stockings (MKS) made of different materials in the various compression classes (CCL).
The article weight in comparison can be seen here use it as the first indicator. Examples:

Our classification for a better overview:
All compression stockings (MD) have the same resting pressure in the respective assigned compression classes. However, they differ in the materials used and knitted yarns and their diameters. This not only results in differences in appearance.
"For the effectiveness of the MD, however, not only the resting pressure, but also the working pressure and thus the material, which differs in terms of elasticity and elasticity (stiffness), is of great importance through a higher stiffness. For this reason there are medical compression stockings made of different materials in the various KKL."1
FINE
Compression stockings with yarns, the properties of which are geared towards fineness and high transparency. These do not meet the requirements placed on stockings that are reimbursed by health insurance companies in Germany.
Material: Light
Working pressure (Stiffness): Week
ELEGANT
Compression stockings in an elegant and beautiful appearance, whose quality and durability match the above. Requirements also meet.
Material: Light
Working pressure (Stiffness): Week
COMFORT
Compression stockings with a good and balanced compromise between comfort and utility.
Material: Medium
Working pressure (Stiffness): Moderat
STRONG
Compression stockings with yarns, the properties and diameter of which allow a high working pressure throughout the day.
Material: Strong
Working pressure (Stiffness): High
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1 Entnommen der Leitlinie Medizinische Kompressionstherapie der Extremitäten mit Medizinischem Kompressionsstrumpf (MKS) ..., Seite 11, Absatz 2.1.2.5
