
I've an eVent jacket and wash it at 40 deg on a synthetic cycle with Nik-Wax Tech Wash then drip dry or tumble on low heat. Been fine for the last 2 years.
You might need to replenish the DWR sometimes but Grangers or TX-Direct wash-in from Nik-Wax do the trick. I do mine about every 6 or so washes.