Dear Anet,
From the wiki it is apperent you are aware of the following, minor bug that is there in regards to waterbreather skins.
The medium and heavy ones are properly working, but us light armor wearers would like to have a different skin too. A few months ago we were able to get the circlet, now, its just a regular waterbreather skin. Please reverse this tiny little bug for us.
Thank you kindly.
-B.