Shinkoda Sunglasses Strap Adjustable Standard End Rope Eyewear Retainer, Pack of 2

For the money, it's a great alternative to the other company's (rhymes with "Tables").

Love them! Already used them!

These seems to work fine with my plastic frames. I was surprised and disappointed, though, that the "wine" colored one in my set was really just standard red, which I probably won't use as a result. The other one is black, however, and that one will be fine.

My glasses are constantly slipping off my ears and nose, specially if I'm active, or bending over. These are perfect for preventing them from slipping down or even falling off. It takes some playing with to get them adjusted, and there is some feeling in the hair on the back of the head, but after a while, it's not noticeable. Not nearly as noticeable as when you bend over and watch your glasses crash to the tile, or worse, fall into a 100-foot deep lake. They are light enough that you don't notice the weight. I recommend them, specially if enjoy activities like fishing and boating.

Bueno