Quality material eye glasses: eyewear frames are hard constructed and made of sturdy metal hinges, and exquisite eye glasses design, all the details ensuring you have a happy satisfaction purchase and long time using.  This metal eyeglasses use the nickle free platting to protect your skin,more environmental & skin-friendly, its good for keep healthy, please buy with confidence for this protective fashion glasses! Strap is very light.It can reduce the pressure on your noses and ears.You can enjoy perfect wearing comfort.