The human body continuously generates heat and regulates its temperature through several natural mechanisms, including perspiration and heat exchange with the surrounding environment. Clothing plays an important role in these processes by influencing how moisture and thermal energy move between the skin, textile, and surrounding air.

However, conventional textile materials do not always provide the moisture management or thermal performance needed to maintain comfort, especially during physical activity, prolonged wear, or exposure to changing environmental conditions.

At AGS, we develop advanced and innovative technologies that enhance how textiles interact with moisture and heat, helping create more comfortable and functional materials for everyday and demanding applications.

The Differentiation Factor

Moisture management, cooling, and thermoregulation represent three distinct but closely connected areas of textile performance. Each influences thermal comfort through different physical mechanisms. Understanding how these mechanisms work helps manufacturers select technologies that deliver the most appropriate performance for their intended applications.

Moisture Management

Moisture management describes how a textile interacts and handles moisture. The three fundamental performance characteristics that help determine how effectively a fabric manages perspiration are: moisture absorption, moisture wicking, and quick drying.

Moisture Absorption
Moisture absorption refers to a textile's ability to take up moisture. This can occur through absorption into the fiber structure or through the retention of liquid within the spaces between fibers and yarns. The fiber composition, surface chemistry, and fabric construction influence how readily a material interacts with water.

Effective moisture absorption helps remove liquid perspiration from direct contact with the skin. However, absorption alone does not ensure comfort. A fabric that readily absorbs moisture but releases it slowly may remain damp for an extended period, increasing its weight and creating an uncomfortable wearing experience.

Moisture Wicking
Moisture wicking involves the movement of liquid through the small spaces within a textile by capillary action. The surface properties of the fibers, along with the arrangement and dimensions of these capillary pathways, influence how quickly and effectively moisture travels through the material.

Advanced moisture management technologies improve the interaction between water and textile surfaces, promoting faster moisture movement and spreading. As perspiration distributes across a larger area of the fabric, more moisture becomes exposed to conditions that support evaporation.

Quick Drying
Quick drying refers to a textile's ability to release absorbed or retained moisture through evaporation. Drying performance depends on several factors, including moisture distribution, fiber absorbency, fabric construction, temperature, humidity, and airflow.

Moisture spreading can support faster evaporation by increasing the exposed wet surface area. Advanced textile technologies can also influence interactions between water and the material, helping accelerate the drying process.

Improved drying performance reduces the duration of fabric wetness and supports greater comfort during activity and subsequent recovery periods.

Together, these three characteristics determine how effectively a textile manages perspiration throughout the entire moisture management process.

Cooling Performance

Cooling technologies influence how thermal energy transfers between the body, textile, and surrounding environment. Different cooling mechanisms produce different effects, ranging from an immediate cool-to-the-touch sensation to sustained heat dissipation under favorable environmental conditions.

Contact Cooling (Cool-to-Touch)
Contact cooling occurs when thermal energy transfers from warmer skin to a cooler textile upon contact. The rate of this initial heat transfer determines the intensity of the cooling sensation.

Materials with higher thermal effusivity can draw heat from the skin more rapidly, creating a stronger sensation of coolness. The Qmax test measures the maximum transient heat flux during initial contact under specified test conditions, providing a useful indicator of contact cooling performance.

However, contact cooling does not necessarily indicate prolonged cooling. The initial sensation diminishes as the temperature difference between the skin and fabric decreases.

Evaporative Cooling
Evaporative cooling occurs when liquid moisture absorbs thermal energy and transitions into water vapor. This process removes heat from the moisture and its surroundings, including the textile and potentially the skin.

Moisture management technologies can support evaporative cooling by improving perspiration absorption, promoting capillary movement, and increasing moisture distribution across the textile. These characteristics can facilitate evaporation and help dissipate heat.

The cooling effect depends on where evaporation occurs, the availability of thermal energy, and environmental conditions. Low humidity and adequate airflow generally favor evaporation, while high humidity can limit its effectiveness.

Passive Radiative Cooling
Passive radiative cooling manages heat transfer through thermal radiation. All materials emit electromagnetic radiation based on their temperature and surface properties. Textiles can influence this process through their optical and infrared characteristics.

Advanced radiative cooling technologies are designed to manage solar radiation and thermal infrared emission. By controlling how the textile reflects, absorbs, and emits radiation, these materials can help reduce heat gain or promote heat loss under suitable environmental conditions.

Their effectiveness depends on the textile's optical properties, surrounding temperature, radiation exposure, and the environment in which the material operates.

Thermoregulation

Thermoregulation in textiles involves managing the transfer, retention, and release of thermal energy to improve comfort under varying environmental conditions. Unlike technologies designed primarily to produce a cooling sensation, thermoregulating materials help control how quickly heat accumulates or escapes from the textile and the microclimate between the fabric and skin.

Several approaches support this function, including thermal insulation, engineered fiber structures, breathable textile finishes, and phase change materials. Each uses different physical mechanisms to influence heat and moisture exchange.

Thermal Insulation and Air Retention
Air has relatively low thermal conductivity, making it an effective insulating medium when retained within a textile structure. By trapping small pockets of relatively stationary air, fabrics can reduce conductive and convective heat transfer and help retain warmth.

Hollow fibers, hollow yarns, and engineered fabric structures introduce internal spaces that increase air retention without necessarily increasing material weight. The size, distribution, and stability of these air pockets influence thermal resistance. This makes structural insulation particularly valuable for lightweight apparel and textiles designed to maintain warmth.

Breathable Thermal Finishes
Specialized textile finishes can improve thermal insulation by creating or preserving microscopic air spaces within or around the fiber structure. Depending on their chemistry and application, these treatments can reduce heat transfer while maintaining pathways for moisture vapor to escape.

This balance is particularly important because thermal insulation alone does not guarantee comfort. When a fabric restricts moisture vapor transmission, humidity can accumulate near the skin and increase discomfort. Breathable thermal finishes aim to limit unwanted heat loss while allowing perspiration vapor to move through the material.

The effectiveness of these treatments depends on the finishing chemistry, coating structure, fabric construction, and environmental conditions.

Phase Change Materials (PCM)
Phase change materials provide another approach to thermoregulation by absorbing, storing, and releasing thermal energy during reversible changes in physical state.

As temperatures increase into the material's phase transition range, the PCM absorbs thermal energy as latent heat. This process temporarily slows temperature increases without requiring an equivalent rise in the material's temperature.

When temperatures decrease, the PCM releases stored thermal energy as it returns to its original state. Microencapsulation allows manufacturers to incorporate these materials into textile finishes, fibers, and foam structures.

Unlike conventional thermal insulation, which primarily reduces the rate of heat transfer, PCM technologies provide temporary thermal buffering. Their effectiveness depends on the phase transition temperature, thermal storage capacity, concentration, and surrounding conditions.

Balancing Thermal Insulation and Moisture Management
Effective thermoregulation requires an appropriate balance between retaining heat and managing moisture. Fabrics that provide high thermal resistance may limit heat loss, but excessive moisture accumulation can compromise comfort and insulation performance.

Combining thermal insulation with moisture-permeable materials and effective moisture management helps regulate the textile microclimate. This allows manufacturers to develop materials that retain warmth while reducing the accumulation of perspiration and humidity.

The optimal balance depends on the intended application, level of physical activity, garment construction, and environmental conditions.

The Added Value

As body temperature rises during activity or heat exposure, the body produces sweat to regulate internal temperature. However, many textiles trap heat and moisture against the skin, creating discomfort, reducing breathability, and negatively affecting performance. Consumers increasingly expect apparel and textiles to actively contribute to thermal comfort rather than simply covering the body.

Thermal comfort depends on more than the temperature of the surrounding environment. Moisture accumulation, fabric wetness, heat transfer, and changes in physical activity all influence how consumers experience a textile. The purpose of technologies are to improve how a textile handles these varying conditions to maintain the comfort of the wearer throughout their daily activities and lifestyle.

Innovative technologies help manage these challenges by reducing heat accumulation, improving moisture transport, enhancing the body’s natural cooling processes, and even moderating temperature fluctuations to provide a controlled thermal response.

From activewear and workwear to bedding and outdoor apparel, moisture and temperature control have become an important differentiator that supports comfort, productivity, and long-term wearability.

Available Technologies