What is the core dilemma of outdoor sports? It is not simply a battle between cold and warmth, but a century-long challenge of balancing warmth retention with moisture management.
Traditional insulation solutions, such as down and synthetic fiber fills, rely on “thickness” to trap still air and retain heat. However, during physical activity, sweat and moisture can accumulate faster than they escape. Once clothing becomes damp, its thermal performance can decline sharply—water has a thermal conductivity approximately 23 times that of air, and soaked down loses nearly all of its insulating ability.
Y-Warm takes a different approach. With a single layer just 0.7 millimeters thick, it is designed to address three key requirements simultaneously: thermal insulation, moisture permeability, and quick-drying performance.
I. Underlying Logic: A Paradigm Shift from “Loft” to “Thermal Conductivity”
At its core, Y-Warm is a flexible, nanoscale closed-cell thermal insulation material. Its design philosophy differs fundamentally from that of traditional insulation materials. Rather than relying on bulk and thickness to trap still air, Y-Warm reduces heat conduction by leveraging its extremely low thermal conductivity, enabled by more than 10,000 independent nanoscale closed cells per square centimeter.
Specifically, Y-Warm features cavity walls just 20–280 nanometers thick, pore diameters ranging from 30 to 190 micrometers, a closed-cell rate exceeding 95%, and an effective porosity of more than 96%. Its thermal conductivity is on the same order of magnitude as that of aerogel. Theoretical calculations show that two layers of Y-Warm stacked together, with a total thickness of approximately 1.40 millimeters, can achieve the same thermal insulation effect as 100 grams of down per square meter.
The technological challenge lies in the inherent fragility of nanoporous materials. Since aerogels were first developed in 1931, they have been known for having some of the lowest thermal conductivity values among solid materials. However, their fragile mechanical properties have long posed a challenge for both academia and industry. Even when aerogels are ground into powder for practical applications, damage to their porous structure can lead to a significant decline in thermal performance.
After eight years of R&D—the project was launched in 2013, achieved its first laboratory success in 2017, completed technical validation in 2019, and officially entered the market in 2021—the Y-Warm team overcame the flexibility challenges traditionally associated with nanoporous materials, giving Y-Warm practical attributes such as sewability and washability. This marked a first-of-its-kind innovation globally.
The YW-01 model, with a thickness of just 0.7 millimeters and a weight of approximately 46 grams per square meter, can increase the perceived temperature of a product by approximately 10°C and is suitable for use across a temperature range of -50°C to 150°C. In outdoor applications, this means that a thin jacket incorporating Y-Warm could potentially replace the bulky insulation layers traditionally required for warmth.
II. Moisture Permeability and Quick-Drying: The “Moisture-Wicking” Mechanism of Hydrophilic Groups
Thermal insulation alone is far from sufficient. During outdoor activities, the human body can produce hundreds of milliliters of sweat per hour. If moisture remains trapped inside clothing, it not only creates a clammy and uncomfortable sensation but can also compromise thermal performance, as water conducts heat far more efficiently than air.
Y-Warm’s moisture-management mechanism relies on the hydrophilic groups inherent in the material. The inner surface, in direct contact with the body, rapidly absorbs moisture from the skin, while the outer surface facilitates its evaporation into the surrounding environment. Its water absorption capacity is approximately twice that of the reference sample used in testing, while its evaporation rate is approximately 2.5 times higher. Even when fully saturated, the material can dry naturally at room temperature in approximately one hour.
More importantly, Y-Warm maintains a high level of thermal insulation performance even after absorbing moisture, directly addressing one of the key limitations of traditional down insulation—its significant loss of insulating performance when wet.
This “absorption from within, evaporation to the outside” moisture-management pathway enables the material to reduce the inward transfer of cold air while allowing water vapor to escape outward—in other words, providing resistance to air penetration while remaining moisture-permeable. For outdoor enthusiasts, this means helping the wearer stay dry during high-intensity activities such as hiking or climbing while maintaining warmth during periods of rest. In addition, the material offers 3A-grade antibacterial performance and antistatic properties, helping to suppress odor buildup during multi-day outdoor activities.
III. Objective Comparison with Traditional Materials
A side-by-side comparison of Y-Warm with mainstream insulation materials reveals even clearer differences.
Down derives its thermal performance largely from loft, with its primary advantage being an excellent warmth-to-weight ratio, particularly in extremely cold conditions. However, it is sensitive to moisture and relies on animal-derived materials. Synthetic fiber fill reduces some of the moisture-related limitations of down, but it similarly depends on loft and material thickness to retain heat, often resulting in bulkier garments while generally providing lower thermal efficiency than down.
Aerogel, meanwhile, offers exceptional thermal insulation performance but is inherently fragile, making it difficult to use directly in apparel applications.
Y-Warm is designed to take a different path, particularly in terms of lightweight construction and multifunctional performance. Rather than simply attempting to outperform traditional materials within the existing framework, it introduces a different approach to thermal management: focusing on thermal conductivity rather than loft as a fundamental measure of insulation performance, while managing perspiration through active moisture transport rather than relying solely on passive breathability.
Conclusion
The value of Y-Warm does not lie in “disrupting” any single traditional insulation material, but in proposing a new approach to thermal insulation: focusing on thermal conductivity rather than loft, managing perspiration through moisture transport rather than passive breathability alone, and replacing centimeter-scale layers of bulky insulation with a nano-engineered physical structure just 0.7 millimeters thick.
For the outdoor apparel industry, this represents a tangible application of advanced materials science. As nanoscale closed-cell materials increasingly enter high-end applications, lightweight design and multifunctional integration are emerging as clear trends in the evolution of thermal insulation technology.