I actually saw this at a boutique before I even saw it in the stores (by brands like Scunci), where you have some sort of clear non-slip product on the underside of elastic headbands. At the boutique, it was on the underside of ribbon headbands, sort of like this: How To Make a Headband, Version 3: Easy Ribbon Headband
. Sooo cute and easy, but no slip. I don't know how a grosgrain ribbon with a little elastic would be able to stay put any other way. When I looked closely at the ones at the boutique, I could see brush strokes, so it must have been semi-liquid when applied. Any ideas? Does this all make sense? (Think rubber cement, but not.