Love the 'hooks'
I got these to help keep my 2 year old son's glasses in place.  It's impossible to find glasses that don't slip down his little nose, so some extra help is needed.  I don't really like the string part because it's not very easy to put on and off.  The hooks that slide on are really great though.  They let you cinch up the glasses and they stay in place.  They can get a little wild when my son tries to put them on, but with help they are perfect.
Rating: 4 stars