e'tra In Italian, it means the sky, the abode of heavenly bodies. Just as all objects in the universe, such as stars, planets, satellites, comets, star clusters, nebulae, interstellar matter, and artificial satellites, reside in the sky. Various designs, materials, and structures have meanings expressed through the product of glasses. [characteristic] 1. Korean version of high-brand quality IP plating 2. Titanium, mold making 3. Design superiority due to years of know-how 4. Structural fit and comfort 5. Lightness that can be worn by advanced users 6. Korea's unique color and sensitivity