# DONZI Eyewear FotoDynamic

> Assos DONZI Eyewear FotoDynamic - Photochromic cycling sunglasses with adaptive lens, 100% UV protection, kraterCooler ventilation and large Shield

- Price: 282.00 CHF
- Brand: Assos
- Category: Glasses
- Availability: in stock
- SKU: 63.99.129.99.PCS

## Assos DONZI Eyewear FotoDynamic

The Assos DONZI Eyewear FotoDynamic is a photochromic cycling sunglasses for riders who won't compromise when light conditions change. The new frame platform sharpens colors, reduces glare and provides **100% UV‑Schutz** for long days on the road bike, gravel bike or MTB. The **FotoDynamic** lens actively adjusts its **light transmission** and covers a wide range from bright to shaded conditions, which is particularly advantageous in the Swiss Alps with tunnels and wooded sections. For cooling airflow and anti‑fog the **kraterCooler** ventilation along the brow is used, combined with large coverage for race‑oriented positions. The result is a calm, clear field of vision that keeps you moving fast – from Lake Zurich to the Panixer. 

- **FotoDynamic** lens with adaptive transmission of approx. 74% to 15% **VLT** for variable light conditions. 
- Large, rimless shield for wide peripheral vision and stable coverage in a racing position. 
- Lightweight **TR90 Grilamid** frame, engineered for durability and high wearing comfort. 
- Adjustable **Megol** nose pad and temples for a non‑slip fit even with sweat. 
- **Oleophobe** and **hydrophobic** coatings keep fingerprints, dirt and road spray away for longer. 
- **100% UV‑Schutz** and impact‑resistant construction that flexes back on impact instead of shattering. 
- Compatible with the **Optical Clip** for prescription lenses – ideal for everyday and training use. 

## Technical Details and Features

The DONZI FotoDynamic relies on a one‑piece polycarbonate Shield that actively adjusts its transmission, ranging from approx. 74% **VLT** in darker conditions to around 15% in bright sun. The frame made of **TR90** and contact points of **Megol**, together with adjustable nose pads and temples, provide a precise, secure fit under virtually any helmet. Assos integrates the **kraterCooler** openings above the lens, which increase airflow over the brow and reduce fogging without noticeably affecting aerodynamics. In addition, **hydrophobic** and **oleophobic** coatings prevent sweat, road spray or fingerprints from impairing your vision, which is especially convincing on long summer rides or wet commutes. For wearers who require correction, the lightweight **Optical Clip** snaps seamlessly into the nose bridge. 

## Use Cases and Benefits

Whether long endurance rides in the Mittelland, fast alpine passes with constant changes in light or dusty gravel loops in the Jura: the **FotoDynamic** lens saves you from swapping lenses and keeps contrasts high. The high coverage reliably protects against wind, insects and debris, while the ventilation preserves a clear field of vision on steep climbs. Thanks to the adjustable contact points, the glasses remain stable even on rough surfaces, which is equally pleasant on technical trails and cobblestones in the city. Those who need vision correction benefit from the unobtrusive **Optical‑Clip** solution without having to give up the performance of a sports sunglass. 

## Fit, Care and Integration

For the best fit, first adjust the **Megol** nose pad and position the temples so they don't collide with your helmet system; this way the DONZI sits securely without creating pressure points. The large‑area lens is shaped to provide a stable field of view with minimal distortion while keeping sufficient distance from eyelashes and facial sweat. Clean the lenses with water and a microfiber cloth so the **oleophobic** coatings retain their effectiveness, and store the glasses in the case when they are not in use. For year‑round riders in Switzerland the combination of **FotoDynamic** adjustment and **kraterCooler** ventilation is particularly practical, because it works reliably from dark winter mornings to sunny midday commutes.

## Variants

- 63.99.129.99.PCS: in stock

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Source: https://kilometro.ch/en/products/glasses-109/donzi-eyewear-fotodynamic-328