-
'The outer coating needs to be replenished periodically to keep it from picking up water and dirt. You can rejuvenate the DWR finish by putting the garment in the dryer at low heat for about 20 minutes, or by ironing under low heat being careful not to melt the synthetic fibers of your garment.
The DWR finish will wear off over time and you may want to re-treat your Castelli product’s water repellency by applying a commercially available water-repellent spray-on DWR treatment by following these instructions'
This is about Gabba.
It's not even as good as a Gabba though, "treated twice" whereas Gabba's being part of the fabric so doesn't wash off.