**Tested by runners. Sharpened for the sun.**
If you're chasing serious output mile after mile, these are the shades to match the pace. Tested by athletes for over two years, the Nagata Speed Blade is District Vision’s purest performance frame to date. Designed with a classic four-base aviator shape, it boosts your field of vision while shielding your eyes from harsh glare. A hint of retro styling nods to heritage sport optics, while the lens tech is all forward momentum: the D+ Copper lens is handcut and polished in Japan for exceptional clarity, with infrared screening and full UVA/B protection for long-haul efforts under unforgiving sun. Oleophobic and anti-reflective coatings keep the view sharp, smudge-free, and focused on what’s ahead.
