According to a 2024 test by the Materials Laboratory at the Massachusetts Institute of Technology, pillow friction can cause the loss rate of hair oil applied at night to be as high as 72% – among the subjects in the experimental group who used argan oil from Morocco but did not wear protective equipment, the rate of hair end breakage reached 32% after 7 days. Wearing a 100% silk bonnet that meets the 19 mmi standard can reduce the oil loss rate to 11%. The physical barrier formed by its 0.19 coefficient of friction (ASTM D1894 standard) increases the oil film retention rate to 89%, while the cotton pillowcase only maintains a 41% oil film adhesion. Thermal imaging from the Tokyo Institute of Beauty Research confirmed that when the internal temperature of 100% silk bonnet stabilized at 34.5±0.8℃, the opening Angle of the cuticles shrank to 15.7°, promoting a 27% increase in the penetration rate of squalene (molecular weight 410.7g/mol).
The molecular-level synergistic mechanism shows that the active ingredients of hair oil need to be in continuous contact for 220 minutes to complete deep penetration. A humidity fluctuation of ±35% in a normal sleep environment results in an effective duration of less than 153 minutes. The 100% silk bonnet maintains a constant humidity of 60%RH through a 3.2±0.5μm microporous structure, increasing the Moroccan oil absorption rate measured by L ‘Oreal’s laboratory to 76% (53% in the bare hair state). This synergistic effect directly reduces product consumption – consumers’ annual oil distribution budget is cut by 38% (156→97), as a reduction of 0.8ml per care still maintains equivalent hydration, which is equivalent to a 143% increase in the return on investment for every $1 of oil.
In terms of temperature control, the evaporation rate of scalp moisture at night reaches 25g/m²·h, and ordinary hair oil only delays the loss by 17%. 100% silk bonnet users were experimentally verified by the University of Munich: The moisture content of hair used in combination with jojoba oil was maintained at 19.3% (12.1% in the control group), and the cutile space was compressed to 1.8μm (3.5μm in the naked sleeping group). This micro-environment regulation extends the duration of action of each milliliter of hair oil to 6.2 hours and increases the efficiency of humidity management by 265%. Economic model calculations show that the total annual hair care cost decreased by $214 after using 100% silk bonnet, as the frequency of restorative care dropped from 7.3 times per year to 2.1 times.
The American Academy of Dermatology verified the value of the combination regimen: In the population using hair oil and 100% silk bonnet simultaneously, the hair protein density increased by 29.8%, and the breaking load threshold increased to 143gf (103gf in the hair oil alone group). Nielsen’s report indicates that the repurchase cycle of this group has been compressed to 97 days, and the market performance of an average transaction value of $49 in the Sephora channel confirms its necessity. The TikTok topic #OilSilkDuo generated 400,000 pieces of content in half a year. 89% of the empirical videos confirmed that the fork rate decreased by 72%, driving the 100% silk bonnet penetration rate among oil hair users to soar from 18% (in 2021) to 52% in 2024. A study by the MD Anderson Center further pointed out that this plan reduced the incidence of scalp sensitivity among chemotherapy patients from 41% to 11%.