Costa Del MarMen's Rinconcito Rectangular Sunglasses, Matte Black/Grey Polarized-580p, 60 mm

Hi, in the tittle of the product it's polarized, and in the description it's "non-polarized" ? so is it or not ?

Are these authentic Costa del Mar’s?

Are these glass or plastic?

From my experience it either it’s supposed to say 580 g or five att plastic or glass your picture just says 580 what is that