Gertrud, a slender and lightweight Boston-shaped metal frame model. This model is from the brand's representative series, inspired by the double dutch rope jumping competition. It's a design that strips away excess to maximize the power of "lines" from the double dutch structure designed in the past. The minimalist silhouette and matte black coloring offer a light feel and excellent fit. Comes with non-prescription lenses; prescription lenses can be fitted at an optician. Number U-153 Color Matt black Material β Titanium Size Temple length 145mm, Bridge width 21mm, Width approx. 131mm, Lens size (vertical) 41.5 x (horizontal) 47mm Thank you for viewing. Color: Black系 (Black-based) Stains, tears, odors, etc.: None