Quick answer

Your Zone sunglasses fog up because warm, humid air hits cooler lenses. The fix depends on the root cause: trapped moisture, a tight seal, or a lens temperature mismatch.

Why fog forms on your Zone shades

Fog happens when moisture in the air condenses on a cooler surface. With sunglasses, that surface is the lens. If you're moving from a cold to a warm environment, or if your face is sweating, the lenses can fog quickly.

The Zone sunglasses have a wraparound frame with side shields made from Grilamid TR-90. That design blocks wind and debris, but it also traps heat and moisture near your eyes—making fog more likely than with open-frame styles.

When to consider a different lens or frame

If you've tried cleaning and adjusting and the fogging persists during high-exertion activities, the Zone's wraparound shape may simply be trapping too much heat for your needs. In that case, a ventilated or open-frame style could be a better fit.

That said, the Zone's Grilamid TR-90 frame is exceptionally lightweight and durable, so it's still a great choice for most daily use once the fog issue is addressed.

Diagnosis: why your Zone sunglasses fog up

  • Symptom: Lenses fog up within seconds of putting them on, especially when moving between temperatures or during physical activity.
  • Likely cause: Trapped moisture from sweat or humidity, a tight seal against your face, or cold lenses suddenly hitting warm air.
  • Corrective action: Clean lenses with a microfiber cloth and anti-fog spray. Adjust the nose pads to create a small air gap. In humid conditions, let the lenses warm up to room temperature before wearing. If fogging stops after cleaning and adjusting, the cause was moisture or fit. If it continues, move to the next step.
  • When to stop or choose another option: If fogging persists after cleaning and fit adjustment during high-exertion activities, the wraparound design may be trapping too much heat. Consider ventilated or open-frame sunglasses for those conditions.

Product facts

  • Zone Sunglasses: The Zone features frames with side shields made with Grilamid TR-90, a light but durable polymer known for its flexibility and resistance to impact. The wraparound design and side shields block wind and debris but also trap heat and moisture, making fog more likely than with open-frame sunglasses.

    Zone Sunglasses

    Zone Sunglasses