TwoShade works great for keeping out that sunlight that peeks in over the top of my sunglasses. I wish I had this years ago, maybe my squint "11" lines wouldn't be so bad.
I love that it floats my expensive prescription sunglasses... you never know when you might take an accidental dip in the water.
It is lightweight and doesn't make my glasses slide down my nose.
I have worn it in pretty windy conditions and I was nervous that a gust might blow it and my glasses off, it wiggled a little but everything stayed on.
I highly recommend for keeping your prescription glasses safe when in or on the water.
I got a neon pink that reverses to white.