This is super quality glasses from Japanese brand called EFFECTOR® - created by NATSUME MITSUNORI the legendary guy in the eyewear scene in Japan. Handcrafted in Sabae city, known for quality eyewear factories. Though popular in Japan, they're a really rare find in Europe. I have some glasses from this brand but this one is bit big for my head so I'm selling out. As you can find in the photo, they use the best material for the bold frame, good quality hinge to make it stronger. I think you can wear it for decades unless you throw them under the car. I'll leave some links you can read https://en.otokomaeken.com/masterpiece/14666 https://www.burgundschild.com/en/brands/effector-eyewear/ Btw I'm Sangmin from Korea - living in cph as a designer. you can also just contact me 50/25/68/11