Polaroid Round Unisex Black Grey Polarized PLD 2124/S are a classic retro round style with a keyhole bridge. Polaroid's famous polarized lenses allow for superb glare reduction and comfortable all day clear vision. The PLD 2124/S 08A M9 Black Grey Polarized are a classic retro round style with a keyhole bridge. Polaroid's famous polarized lenses allow for superb glare reduction and comfortable all day clear vision.