KastKing KKS-SI-298-R-D Pioneer Polarized Sport Sunglasses, Silver Mirror, 0.6 oz 100% Other Fibers They weigh only 0.6 ounces/18 grams and are highly impact resistant to compliment your active lifestyle KastKing pioneer Featherlite Sun glasses have 100% Polarized Revo coated lenses Wear them with comfort for riding, driving, fishing, running, skiing, boating, cycling, golf and all other outdoor activities or work