When wearing my mask on the surface the glare from the sun gets to me and I cant see anything if looking in that direction, so the back of the head seems like a logical place. Its no more likely to get washed of by waves in that position than if it was on my face.
Besides my back-up around my neck prohibits me from leaving it around my neck.
Besides my back-up around my neck prohibits me from leaving it around my neck.