37.5 technology WPB laminate
- story by MaterialDistrict
These fabrics have been coated with a waterproof breathable (WPB) laminate, meaning water vapour that builds up from your body is able to escape out of the laminate layer. However, this vapour is not able to evaporate through the laminate membrane until humidity reaches 70% underneath the laminate. By adding 37.5 particles to the laminate, the particles are able to attract water vapour at very low concentrations, thus not letting your microclimate rise anywhere near 70% humidity and keeping it around 37.5%.
37.5 Technology helps keep your body at the ideal core temperature of 37.5° Celsius and helps keep the microclimate next to your skin at the ideal relative humidity of 37.5%. When you’re hot, patented active particles embedded in the material remove sweat in the vapor stage before liquid sweat forms, cooling you down. When you’re cold, those same active particles trap your energy to help warm you up.
As far as process details, the technology is not a chemical finish. 37.5 patented, active particles are permanently embedded within the fiber/fabric so that it never washes out and the user will see the benefits of our technology for the lifetime of the garment.