A fiber with inherent cooling sensation  
In recent years, with technological advancements and further reductions in fiber production costs, high-molecular-weight polyethylene fibers have rapidly expanded into civilian applications. Fabrics woven from this fiber offer a distinct cool touch and exceptional durability, making them widely used in mattresses, seat cushions, cooling mats, ice sleeves, and sportswear. Thanks to their refreshing and skin-friendly tactile properties, these products deliver a novel lifestyle experience for consumers.


Polyethylene fiber, also known as "polyethylene," is a type of polyolefin fiber. The material itself has a high thermal conductivity, enabling it to quickly dissipate heat, which makes it ideal for cooling applications. Fabrics made from this fiber feel smooth and silky, mimicking the texture of silk. Additionally, its stable chemical bond structure provides natural water-repellency, antibacterial, and anti-mold properties, making it an excellent new fiber material with superior overall performance. The polyethylene composite fiber produced by Kaitai Special Fiber Technology Co., Ltd. combines high-molecular-weight polyethylene with other fibers through co-spinning technology, enhancing softness while maintaining strong cooling effects, and has passed professional cold-temperature perception testing and certification. Furthermore, the application of composite spinning technology enables fabrics to achieve a satin-like finish, increasing product variety and design options.


Mattresses and cooling mats made from this fiber can reduce indoor air conditioning temperature requirements by 1°C to 2°C during hot summer months. Studies show that for every 2°C increase in air conditioning temperature, energy consumption drops by 7% to 8%, reducing carbon emissions by approximately 800 grams—achieving significant energy conservation and environmental benefits. Sportswear made from this fiber creates an immediate cooling sensation of 1°C to 2°C upon contact with the skin. Under prolonged sun exposure, it reduces surface body temperature by 3°C to 4°C, significantly lowering sweat rate and discomfort caused by heat, thereby helping relieve fatigue. 
A Kevlar fiber with exceptional thermal insulation performance


Hollow fibers and ultrafine fibers are among the most thermally insulating synthetic fibers. Research has shown that a fiber's thermal insulation capability is directly proportional to the amount of stagnant air trapped within its structure, inversely proportional to fiber diameter, and inversely proportional to overall material density. Aerogel fibers, characterized by extremely high porosity and ultra-low density, are theoretically the best-insulating fibers available and have the potential to replace ultrafine fibers and even revolutionize down insulation, representing the most promising direction for next-generation thermal insulation fibers. However, their high porosity also presents significant challenges in fabrication.


Based on this, Dr. Zhang Xuetong and his aerogel research team at the Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, dissolved DuPont™ Kevlar® fibers to obtain a nanofiber dispersion, which was then processed through wet spinning and specialized drying techniques to produce a Kevlar aerogel fiber with exceptionally high porosity (98%) and specific surface area (240 m²/g). This aerogel fiber exhibits outstanding mechanical properties, enabling it to be freely bent, knotted, or woven. It also demonstrates excellent thermal insulation, with a thermal conductivity of only 0.027 W/m·K at room temperature—its insulation performance at low temperatures is 2.8 times greater than that of cotton fabric—and can maintain effective thermal insulation under extreme conditions ranging from -196°C to 300°C. Furthermore, the fiber shows remarkable chemical stability, allowing various modifications such as dyeing, hydrophobization, and electroless plating without compromising the integrity of the aerogel framework. Notably, by incorporating phase-change materials into the fiber, it can be transformed into an "air-conditioning fiber" with a heat capacity of up to 162 J/g—significantly exceeding that of currently available commercial Outlast air-conditioning fibers. 
A fiber that makes clothes warm on their own


In daily life, ordinary undergarments often feel cold when first worn because of the temperature difference between the skin and the fabric, leading to heat conduction. People frequently end up warming the clothing with their body heat—especially during winter mornings, which can be both uncomfortable and bothersome.


Is there a solution? At the 2019 China Brand Day event, Shanghai Zhengjia Milk Silk Technology Co., Ltd. introduced an innovative fiber called "Yi Re Bao" (Warm-Generating Fiber), capable of making clothes warm by themselves.


The Yi Re Bao fiber is a high-moisture-regain modified acrylic fiber containing abundant hydrophilic groups such as -OH, -NH3, -COOH, and -CONH, giving it exceptional moisture absorption capacity. At 20°C and 65% relative humidity, its moisture absorption ability is approximately 3.5 times greater than that of cotton. Moreover, this fiber can continuously and repeatedly absorb and release moisture (breathing) in response to environmental changes. As it absorbs moisture, it generates adsorption heat—meaning it naturally warms up after taking in water. Therefore, fabrics made from this fiber can absorb the moisture (trace amounts of sweat) emitted by the body, generating heat and accelerating the thermal equilibrium between the skin and clothing, thereby reducing the temperature difference. Additionally, due to its outstanding moisture-absorbing properties, MiaoKa effectively prevents the chilling sensation caused by sweating, keeping the inner layer dry, comfortable, and consistently warm for extended periods. 
A fiber that captures heat and enhances oxygen delivery  
Recently, the renowned sportswear brand Under Armour launched a new line of athletic apparel called "Rush," crafted from high-tech fabric. This innovative material incorporates Celliant® patented technology, weaving natural mineral components into the fabric fibers. It effectively captures body heat released by athletes and re-emits this energy back to the wearer via far-infrared radiation, thereby improving athletic performance. The ultimate goal of this energy exchange process is to dilate blood vessels and increase the body’s oxygen-carrying capacity, providing athletes with a subtle yet significant boost during competition and training.


Under Armour has long been committed to supporting athletes through the integration of science and technology. In 2018, the brand introduced the "TB12 Recovery Sleepwear," designed with active ingredients in the fabric to aid post-exercise recovery, followed by a full range of recovery-focused apparel. Now, the Rush collection takes this innovation further by leveraging advanced materials to help athletes wearing it recover faster and perform better.


Oxygen is one of the most critical factors influencing an athlete's recovery, sleep quality, and overall performance. Rush increases the blood’s oxygen-carrying capacity, directly contributing to improved results. Currently, Under Armour’s sponsored athletes are already using the Rush line for training and competition across various sports including soccer, football, volleyball, weightlifting, and combat sports. Many athletes who have tested the garments have provided initial feedback: after regular training sessions in Rush apparel, some reported significantly less muscle soreness than usual.