There are no springs in the arms of the glasses so if you try to hang them from a car visor or from the neck of your shirt, the other arm will open up.  Other than that the mirror and darkness is incredible.  Great for really sunny highway usage.  These are the darkest pair of sunglasses I have ever owned.  Good for people who go through sunglasses or lose them or have girlfriends with really big butts that sit on the glasses all the time. *clearly speaking from experience*

Worth the money. Extremely cheap.  Made in China.