1. What is VLT ? and why photochromic lens fit for all weather scense ?
VLT (Visible Light Transmission) Reference Scope:
VLT 0-10% - Deep gray color lens, For sunny days
VLT 10-25% - Gray color lens, For partially clouded to sunny days
VLT 25-60% - light gray color lens, For cloudy days and dusk
VLT 60-99% - Clear lens, For night and heavily clouded days
Questions and Answer
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Questions 1: The VLT turns from step by steps ?
Answer: the VLT changes are gradual, not step by step .
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Questions 2: What is the response delay from dark to clear, and clear to dark?
Answer: it depens on the degree of sunlight , The stronger the sun, the shorter the time for transparent graying . it usually takes about 4 or 5 minutes to gray . and it takes 6 or 8 minutes from gray to clear .
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Questions 3: Why are the grayed photochromic lenses on the market most common?
Answer: Gray lenses absorb infrared light and 98% UV light. The biggest advantage of gray lenses is that they do not change the original color of the scene due to the lens. The most satisfactory is that it can effectively reduce the light intensity. The gray lens absorbs evenly on any chromatogram, so the viewing scene will only darken, but there will be no obvious color difference, showing a true natural feeling.
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Questions 4: Will the color-changing lens become less discolored as the time of use?
Answer: Any lens has a certain service life, and the color-changing lens is no exception, but if you pay attention to maintenance, its life can last for about two years.
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2. OTG (OVER-THE-GLASSES) DESIGN
Ski goggles that fits over glasses. Suitable for both ADULTS AND YOUTH.
3. ANTI-FOG LENS & EXCELLENT OPTICAL CLARITY
Dual-layer lens technology with anti-fog coated inner lens gives you a FOG-FREE SKI EXPERIENCE.
4. SAFE & RELIABLE WITH UV PROTECTION
Soft TPU frame with lenses that provide 100% UV400 protection and YEARS OF RELIABLE USE.
5. UNIVERSAL HELMET COMPATIBILITY
Extra long elastic strap ensures great helmet compatibility with all helmets. Suitable for both adults & teens.
6. VENTILATION & FRAMELESS DESIGN:
Designed to reduce fogging and optimizes the flowing air over the inside of the lens.