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These frames allow you to use your prescription lenses whilst wearing your men in kendo or other budo where you need to wear bogu. By making the frames as slim and light as possible, it's possible to wear your lenses discomfort or distraction.
The frames are made from durable titanium and are worn using an adjustable band that can be removed and replaced, they also feature pads that prevents pain around the ears. To avoid sweat from getting into your eyes when wearing these glasses, there is also a rubber pad which catches and re-directs sweat away from your eyes and keeps your frames in place, preventing slipping.