Alpina Twist Four Shield VL+ black matt / Varioflex+ orange fogstop - Glasses

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Description of Alpina Twist Four Shield VL+ black matt / Varioflex+ orange fogstop - Glasses

The best possible visibility and draft protection for that breath taking descent through the Stelvio Pass. The Alpina Twist Four Shield VL+ is part of Alpina's Performance range, and has a particularly large wind-proof shield featuring a mirrored self-tinting Varioflex + Fogstop lens. Also included are adjustable inclination, Twist-Fit nose and venting lens.

  • Varioflex + Fogstop
  • Twist Fit Nose
  • Adjustable Inclination
  • 2-Comp Design
  • Venting Lens
  • Optimized Airflow
  • Case Inclusive

Varioflex + Fogstop:
  • Break-resistant
  • 100% UV A-B-C protection up to 400 nm
  • Hard Coating on the outside
  • Antistatic fogstop coating on the inside
  • Automatic adjustment of lens tinting to ambient light conditions
  • Tinting range covers 3 protection levels (S1-S3)

Varioflex is a lens technology which allows glasses to adapt to the weather conditions. Just as the chameleon changes to blend in with its surroundings, so these lenses adopt various tints to protect our eyes. The self-tinting photochromic lenses react to UV light, which causes chemical components within them to turn towards the source, producing a shading effect. When the UV light source diminishes, the lenses become lighter again. The process all takes place in a matter of seconds - giving you glasses that are always adjusted to match the changing light conditions.

FogStop is a coating applied to the inside of the lens. It is not smooth but rough - seen through a microscope it looks quite fissured. This makes it impossible for moisture droplets to form a covering layer, i.e. to mist up the lens, impairing visibility. This could only occur if the humidity level was such that all the fissures filled with water. But before this can happen, the stored moisture actually condenses, keeping the lens clear - no hairdryer required!

Twist Fit Nose: Good sports glasses can be adjusted to fit any shape or width of nose. And Twist Fit Nose is the perfect system, featuring a subtle locking mechanism inside the nose pad.

Adjustable Inclination: The articulated arms allow the glasses to be tilted away from the forehead during strenuous ascents and tilted back to reduce draft on the way down. Clear, mist-free visibility at all times.

2-Comp Design: The combination of hard frame, soft arm tips and nose pads enhances the fit and comfort of the glasses.

Venting Lens: Vent holes in the lens channel the air flow to the right places and assure back ventilation of the lens for effective fogging prevention.

Optimized Airflow: Heavily curved lenses in combination with indirect air flow channeling assure vision that is not impaired by draft or fogging.

Case Inclusive: This Alpina sport sunglass comes in a case. The cases for the Tri models also accommodate their changeable lenses.
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Fact Sheet of Alpina Twist Four Shield VL+ black matt / Varioflex+ orange fogstop - Glasses

Product Name: Alpina Twist Four Shield VL+ black matt / Varioflex+ orange fogstop - Glasses
Manufacturer: Alpina
Item Code: ALP173189
Year: 2017
Weight: approx. 21 gram (manufacturer's specs)
Frame color: black
Lense tint (color): orange (Varioflex Orange S1-S3 Fogstop)
Lighting conditions: Self-tinting, adjusts to light conditions, covers three protection levels, medium to high light protection.
Light transmission: 8-80%
Filter category: S1-S3
Included in delivery: glasses, softcase, cleaning tissue for lenses
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