Men 's high - grade aviation aluminum - magnesium polarized polarizing sunglassesPolarized sunglasses, high quality TAC and magnesium alloy production, exquisite workmanship, stylish atmosphere, highlight your personality temperament. With high-definition visual seven features: high-definition vision, blocking glare, true color, impact resistance, comfortable visual sense, UV400 protection, anti-fatigue glare and radiation. Material: TAC, Aluminum magnesium Color: Gray, Blue Size: + L:149mm + W:136mm Accessiory: None