Most companies suggest drying anything with a dwr coating (this includes many gortex garments, even membrane jackets require a dwr layer to prevent the jacket wetting through). Drying with heat renews this coating, washing also helps clear dirt from the dwr layer which increases waterproofness/breathability.
Superbikeboy t1_jbs3wy2 wrote
Reply to comment by fuck_off_ireland in A true BIFL jacket, the Stevenson Jacket made by Boathouse. I’ve had mine for over 15 years, rowed multiple seasons in it, wore it shoveling snow, commuting in NYC, and hiking. A waterproof 3 season jacket you can still purchase. by ripgoodhomer
Most companies suggest drying anything with a dwr coating (this includes many gortex garments, even membrane jackets require a dwr layer to prevent the jacket wetting through). Drying with heat renews this coating, washing also helps clear dirt from the dwr layer which increases waterproofness/breathability.