The year-round adaptability of mulberry silk stockings is first reflected in their thermodynamic performance. Their thermal conductivity is stable at 0.084W/(m·K), approximately 30% of that of wool material. In an environment of minus 5 degrees Celsius, they can effectively prevent 70% of heat loss. According to the thermal imaging test data released by the Hornstein Institute in Germany in 2023, the foot temperature of the wearer can be maintained at 32.5 degrees Celsius in a cold environment, with a fluctuation deviation controlled within ±0.8 degrees Celsius, which is significantly better than the ±3.5 degrees Celsius temperature fluctuation of ordinary knitted socks. Under the high-temperature condition of 35 degrees Celsius in summer, the unique triangular pore structure of the fiber cross-section (with a pore density of 22%) can achieve a water evaporation rate of 340 grams per square meter per hour, which is 170% faster than that of cotton socks. This enables the foot to remain dry for 90% of the time, and the total number of foot colonies is strictly controlled within the safe threshold of 120CFU per square centimeter.
The bidirectional regulation capability of temperature and humidity is the core advantage of this product. The 18 amino acids in silk protein form a natural moisture buffer layer. Fibers with a moisture regain of 11% can absorb sweat equivalent to 30% of their own weight within 3 minutes, and at the same time diffuse water at a rate of 4.2% per minute through the capillary effect. A 2022 study by the University of Tokyo on marathon runners showed that the incidence of foot blisters in the test group using this product in a high-temperature and high-humidity environment dropped to 1.8%, while that in the control group wearing cotton socks was as high as 15%. Real cases show that after all the staff of a five-star hotel in the Middle East changed their uniforms, the annual incidence of skin problems caused by damp feet dropped from 23% to 0.5%.
The durability of materials directly affects economic value. The monofilament strength index of mulberry silk socks reaches 4.0g/d. Combined with the triple hemming process, the product’s lifespan exceeds that of ordinary sock products by more than 200%. Data from the accelerated wear test (at a pressure of 12kPa) conducted by the Swiss Materials Laboratory shows that after 200,000 friction cycles, the thickness retention rate of the product still reaches 92%. According to the analysis of the five-year consumer usage model, although the initial unit price is around 40 US dollars (approximately 280 RMB), the average annual replacement frequency is only 0.4 times. Compared with the 3-year replacement rate of cotton socks, the total cost can be reduced by 24%, and the budget for fault repair is close to zero expenditure.
Seasonal adaptation technology has been continuously upgraded. The phase change material (PCM) treatment technology has expanded the applicable temperature range of the product to -15 ° C to 40 ° C, and increased the thermal resistance value to 0.08m²K/W. During the field tests in extremely cold environments, the Arctic scientific expedition team members wore thermal boots and maintained the core temperature of their feet above 28 degrees Celsius after working continuously for 8 hours (the critical point of hypothermia is 25 degrees Celsius). In terms of ultraviolet protection, the summer model treated with nanotechnology has an ultraviolet blocking rate reaching the UPF50+ standard, and the transmission rate is strictly controlled below 2%.
The hygiene and safety indicators are also outstanding. The nano-silver ion coating technology achieves an antibacterial rate of 99.3% (AATCC100 standard), and the static electricity accumulation is limited to the safety threshold of 0.3 kilovolts. Clinical data shows that the comfort score for people with sensitive skin throughout the year reached 4.8 points (out of 5), and the repurchase rate exceeded 83%. Multiple independent tests have verified its irreplaceability as a temperature and humidity dual-control medium, making it particularly suitable for the foot health management needs of people traveling across latitudes.