eVent is a fabulously breathable fabric, better than any other. To ensure the performance and longevity of your eVent jacket, it is really important that you wash it regularly, particularly if you are using it a lot. We appreciate that this can be a hassle, but at the very least you should always wipe down the areas of the neck and lower hood that most commonly come into contact with sweaty skin. Build-up of salt will contaminate the membrane and cause it to start to delaminate, so a good rinse with water is vital.
More information about caring for your eVent jacket can be found here.