. DISTRICT VISION uses Japanese engineering to create each pair of glasses and tests them on a group of downtown runners to get real-time feedback. , These 'Koharu' sunglasses are made from ultra lightweight polycarbonate with a durable titanium core, Hypoallergenic rubber nosepads with sweat-repellent coating prevent them from slipping, Fitted with anti-reflective, shatterproof D+ Indigo Mirror lenses for infrared, UVA/B and blue light protection, Treated for an oil-and water-resistant finish
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