FRAME: Crystal Gray / LENS: Charcoal Used approximately 10 times. Please understand that this is a used item. Please ask any questions you may have before purchasing. ■ Retail Price 71,500 yen ■ Product Description The BOSTON PRO is based on the classic BOSTON model, with the added functionality of a flip-up front. While maintaining the original lens shape, it utilizes titanium inner metal for the rims. The unique structure, which connects moving parts, allows for a compact mechanism. This gives it a smarter impression than typical flip-up frames, making it look like a regular pair of sunglasses at first glance. It's a single-lens type that allows you to turn the sunglasses on and off without removing them. However, this BOSTON PRO is equipped with a half-rim (nylon rim) metal rim on the inner side, allowing for a double-lens type (compound) configuration by inserting lenses into the inner frame. Another key feature is the standard nose pads with adjustable nose pieces (clings).