There are 4 lenses, The design style of the sunglasses is a steam punk style,
Circular lens, clamshell design, metal frame,
spring glasses frame This is the advantage of sunglasses,

there are many advantages Defect of sunglasses: The frame width of sunglasses is smaller than that of ordinary glasses,
Frame width of ordinary glasses is 130mm-135mm, this Sunglasses only 125mm frame width,

So, the small size of the head circumference people wearing the sunglasses are more comfortable.

Mirror legs of the spring is flexible, so also suitable for large size