JUSTIN Sunglasses by Kirk & Kirk. Material: Acrylic, Shape: Square, Color: Amber, Flame, Onyx, Sunset, Size: 53-19-143. Cultivated with the help of high-quality materials, these sunglasses offer both durability and UV protection for optimal eye care in the sun. The Kirk & Kirk's JUSTIN sunnies feature a bold and distinctive square frame design that exudes a blend of retro charm and contemporary style. Available in a range of vibrant colors, the JUSTIN shades are perfect for making a bold fashion statement while enjoying outdoor activities.