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Package Content 1*sunglasses frame 4* pairs of lens(only gray lens is Polarized ) 1*headband 1* straps 1*glass pouch 1*cleaning cloth 1*protective box Different Use Occasion Only the grey lens is polarized, brown and clear lens both are coated to block UV(ultraviolet ray), yellow lens is night vision,the tactical sunglasses can change lens in different usage occasion Gray lens; for wearing in strong sun, absorb reflect light effectively Brown lens; for wearing in sun or daytime, block and filter light Transparent lens; for wearing in dirty,sandy, or fogging day, can enhance definition Yellow lens; for wearing on night or dart condition, can improve visual brightness