The Berg eyeglasses are crafted in a classic design with a square aviator shape and double bridge. This half rim frame features metal brows and acetate temples; hypoallergenic, nickel-free metal is non-corrosive and retains its shape, and acetate is durable, yet lightweight for a comfortable feel. Enjoy the union of style and performance in these uncomplicated Berg glasses. Please note these frames are best suited to those with average/medium sized faces.