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Ryders Eyewear

<p>A classic silhouette with a bit of a cat eye lift, the Norvan have a look all their own.</p><ul><li>Polarized lenses cut glare on water, snow or pavement</li><li>Snap style hinges have a dynamic mechanical look to them</li><li>Frame vents help keep fog to a minimum</li><li>Anti-slip nose pads and temple tips</li><li>Grilamid TR90 thermoplastic frames are flexible, durable and light</li><li>6-base lens curve offers great coverage</li><li>Fits medium faces best</li></ul>

Ryders Eyewear Norvan Polarized Sunglasses

TR90 thermoplastic offers good resistance to chemicals and torsion. Propionate is a light, nylon-based, hypoallergenic plastic that's very strong and offers more transparency and gloss than other plastics.

Fixed tints provide a constant degree of darkness. Photochromic lenses adjust to changing light levels. Polarized lenses absorb horizontal reflected glare to improve clarity around surfaces like snow or water.

0-10% – very heavy tint, too dark for most needs. 
10-30% – heavy tint for bright sunny days.
20-60% – light tint, great for cloudy, overcast conditions and shady trails. 
60-80% – very light tint (often coloured), for improving contrast in low-light conditions, think dawn or dusk. 
80-100% – little to no tint, this what you want in the dark.

Refers to the horizontal width in millimeters of one of the frame's lenses.

The gap between the lenses, measured at the smallest point.

Measures the height of the lens within the frame, excluding the lens curve.

These optics are designed to fit comfortably over most eyewear.

Interchangeable lenses let you change lenses to suit differing light conditions or activities.

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Ryders Eyewear Norvan Polarized Sunglasses

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