Masunaga® MONK Sunglasses by Masunaga®. Color: S39 BLACK, S22 SILVER, S11 GOLD, Size: 52-21-145. Two-Bridge Boston's glass polarized sunglasses frame "MONK". This is the same series as the popular "BIRD", which has been announced by 2023SS. Each part uses round wires and is finished with only the lines to create an inorganic image. The temples are designed to be thicker and thicker to take into consideration weight balance, and the inside has a line to prevent slipping and a slope that makes the comfort softer, making it more functional.