When developing insulated products, thermal insulation is often described using simple terms such as “warm”, “lightweight” or “high performance”.
In reality, thermal insulation is far more complex.
The thermal performance of an insulated product depends on the interaction between the insulation material, garment construction, moisture management, air movement, product fit and intended use.
Understanding these relationships helps product developers select insulation based on performance rather than thickness or weight alone.
Thermal insulation is the ability of a material or product to reduce the transfer of heat.
In clothing and footwear, the objective is usually to slow the loss of body heat to the surrounding environment while maintaining comfort.
Insulation does not generate heat.
Instead, it helps retain the heat naturally produced by the body.
The better an insulation can maintain this layer of warm air, the better it can contribute to thermal comfort.
One of the most common misconceptions is that fibres themselves provide warmth.
In reality, the primary insulator is the still air trapped within the insulation structure.
The fibres create millions of tiny air pockets that reduce heat transfer.
Different insulation materials achieve this in different ways through variations in:
This is why two insulation materials with the same weight may perform very differently.
A thicker insulation is often assumed to be warmer.
Although thickness can improve insulation performance, it is only one factor.
The efficiency of the fibre structure is equally important.
Modern microfibre insulation can often provide similar or higher thermal performance than thicker traditional insulation materials while using less space.
For product developers, this creates opportunities to design lighter, slimmer products without compromising thermal comfort.
Insulation should never be evaluated in isolation.
The finished product also includes:
Each of these influences how warm the finished product feels during use.
Laboratory values provide an important comparison between insulation materials but cannot fully predict the performance of the finished product.
Several methods are used to evaluate thermal insulation.
Among the most common are:
Each method measures different aspects of thermal performance.
No single value describes every characteristic of an insulation material.
Understanding the strengths and limitations of each measurement helps developers compare materials more effectively.
The warmest insulation is not always the best solution.
Every application requires a different balance between:
The most suitable insulation depends on the performance priorities of the finished product rather than a single laboratory value.
The MEIDA insulation platform has been developed to offer different approaches to thermal performance.
MEIDA Original focuses on achieving high thermal performance in a thin, lightweight construction using 100% polypropylene microfibres.
MEIDA Soft adds hollow polyester microfibres to increase loft, softness and recovery.
MEIDA Ceramic builds on the same platform with integrated FIR functionality.
MEIDA Clima addresses thermal comfort differently by using PCM technology to help regulate temperature fluctuations rather than increasing insulation.
Each solution addresses a different performance challenge while sharing the same objective: improving thermal comfort through intelligent insulation design.
Thermal insulation is the ability of a material or product to reduce heat transfer.
Insulation works by trapping still air, reducing the transfer of heat from the body to the surrounding environment.
No. Insulation helps retain the body’s natural heat but does not create heat itself.
The combination of trapped air, fibre structure and product construction determines thermal performance.
No. Fibre technology and construction can allow thinner insulation to achieve excellent thermal performance.
Still air is a poor conductor of heat, making it the primary insulating element in textile insulation.
Yes. Fabrics, membranes, fit, seams and ventilation all influence thermal comfort.
Thermal resistance measures how effectively a material resists heat transfer.
Both describe thermal insulation but use different measurement systems and standards.
Yes. Fibre structure, density and construction significantly influence thermal performance.
Yes. Moisture can influence heat transfer and user comfort depending on the insulation material and product design.
Yes. Air movement can increase heat loss by removing the warm air trapped within the insulation.
There is no single factor. Thermal performance should be evaluated together with weight, thickness, moisture management, loft and product construction.
MEIDA Original is designed for applications where maximum thermal performance is required in minimal space.
MEIDA Soft provides additional loft and softness through hollow polyester microfibres.
No. MEIDA Clima focuses on temperature regulation using PCM technology rather than increasing insulation value.
The best comparison combines laboratory values with an understanding of product construction and intended application.
They provide objective methods for comparing insulation materials under controlled conditions.
No. The optimal insulation depends on the specific requirements of the finished product.
Gloves, footwear, workwear, outdoor apparel and bedding all place different demands on insulation performance.
Whether you’re developing apparel, footwear, gloves or bedding, our specialists are ready to help.