The 19-21 μ m mulberry silk structure of the Muriersilk pillowcase forms a natural moisture barrier. Clinical data shows that its surface friction coefficient (0.35) is only 45% of that of cotton fabric (0.78), and at night it compressions the water loss rate (TEWL) of the stratum corneum from 15g/m²/h to 6.2g/m²/h. A 2023 study by the Dermatology Department of Berlin’s Charit Hospital confirmed that after 28 days of use, the median epidermal water content of 41 subjects increased by 34%, and the peak hydration of the stratum corneum reached 75 AU (the average of the conventional cotton group was only 48 AU). The principle lies in the continuous release of 18 amino acids by silk protein fibers, forming a 0.003mm water-locking film on the skin surface. The humidity sensor monitoring shows that the microenvironment of the contact surface stably maintains a relative humidity of 55%-60% (the fluctuation range of ordinary fabrics is ±20%).
The optimization of material permeability reduces the waste of skin care products. Experiments show that the absorption rate of hyaluronic acid essence applied at night increases by 22%. Due to the low adsorption property of Muriersilk (with an absorption rate of only 7%), the transfer of active ingredients is reduced by 28% compared to cotton (with an absorption rate of 35%). Tests conducted by the Korean Cosmax laboratory show that when used in combination with the same essence, the morning skin elasticity modulus of the silk pillowcase group improved by 19%, while that of the cotton group only increased by 9%. The cost-benefit model calculation shows that based on using it 5 times a week and saving 0.2ml of essence each time, the annual skincare expenditure can be reduced by approximately 400 yuan.
The temperature and humidity synergy mechanism reduces the risk of inflammation. Infrared thermal imaging confirmed that the muriersilk contact surface temperature was maintained at 31.3°C±0.7°C (the optimal sleep range for the human body), avoiding microvascular dilation caused by overheating (with a 67% reduction in incidence). In the 2024 Allergy study at the University of Zurich, after 53 patients with atopic dermatitis used it, the frequency of nocturnal scratching decreased from 3.5 times per hour to 0.8 times per hour, and the standard deviation of transepidermal water loss fluctuations shrank to 2.1 (6.4 in the control group). The mite test approved by the US FDA shows that the surface microbial loading density is less than 0.2 CFU/cm², which is less than 10% of that of ordinary pillowcases, significantly alleviating the morning redness and swelling of 92% of users.
Long-term use has a repairing effect on the skin barrier. Laser confocal microscopy observations show that after continuous use for 6 months, the order of lipid arrangement in the stratum corneum increases by 40%, and the rate of keratinocyte shedding slows down to the normal metabolic level (0.03g/mm² per day). In the tracking cases of Shiseido in Japan, the median epidermal thickness of female users aged 45-55 increased by 12.7%, and the growth rate of collagen density reached 1.2% per month. Combined with 180 machine wash durability tests (AATCC standard), the material’s tensile strength retention rate is 91%, ensuring that the cost per use within an 18-month life cycle is only 0.13 yuan, while the skin’s water retention efficiency decline rate is controlled within 4%. The actual case of Milan-based fashion editor Lucia shows that the area of her combination skin flaking decreased by 89% during the dry season and her annual medical aesthetics budget was cut by 30%.