I’m curious what is happening when a DWR is reactivated, I’ve been told by many outdoor enthusiasts to put my rain shell in the dryer to reactivate my DWR but what is occurring and how is it reactivated?
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It seems that the dryer is the method of applying a new coating, rather than activating an already existing coating. This is similar to how dryer sheets use the heat of the dryer to spread fabric softener over your clothes. [Source: Wikipedia](https://en.m.wikipedia.org/wiki/Durable_water_repellent)
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