Do you also have troubles like this? It is gloomy when you leave in the morning, bright sunshine in noon, and then scattered showers in the afternoon? Don’t worry, the Storm All-Weather Lenses newly launched by ZIV Sports Sunglasses provide 79%~15% photochromic lenses, which appears transparent with clear vision under dim light, and turns dark when the sun is out; it can even provide anti-fog, anti-grease and anti-splash functions on rainy days.

ZIV Sports Sunglasses Storm Series features “Anti-Fog Function”, preventing the lenses from becoming foggy when you take a short break from climbing.

Polarized lens can avoid eye fatigue and poor sight as a result of glare. This is the polarized lens that everyone commonly sees.
The Polarized lenses of ZIV Sports Sunglasses are made with non-fragile polycarbonate (PC), and features only decentered function to reduce visual distortion. 

The photochromic lens is composed of micro photo-sensitive elements, so that the color of the lens will turn darker when it comes in contact with UV rays.
Photochromic lens is made with polycarbonate capable of blocking out UVA and UVB completely.
Photochromic lens can turn darker within 12 seconds, and return to the original color within 2 minutes.
ZIV Sports Sunglasses use French BNL precision hi-tech shock-proof PC photochromic lens, which not only features 100% anti UVA and UVB protection function, the lens can also turn darker or lighter according to the strength of the sunlight within a short period of time, thereby protecting eyes against strong light. It has passed the optical standards of advanced countries in Europe, America and Australia, and has obtained certification approval from Taiwan’s Bureau of Standards, Metrology & Inspection. 

UV rays are a part of natural radiation, and are part of the visible spectrum.
UV rays can be categorized into three types: UVA, UVB, and UVC.
Long-term exposure to UVA and UVB will increase the possibility of harm to your eyes and cataracts, which will cause long-term discomfort. All optics lenses of ZIV Sports Sunglasses are capable of blocking out UVA and UVB 100%.

Yes. ZIV Sports Sunglasses provide several types of lens colors for selection according to the customers’ individual preference, as well as the outdoor lighting conditions.

• Gray and tawny lenses are suitable for use under sufficient lighting; with the least color distortion.
• Yellow lenses can be used on cloudy or rainy days to provide brighter vision, offering better sight in cloudy or foggy weather, as yellow lenses are capable of strengthening the color contrast under weak lighting.
• Transparent lenses protect the wearers’ eyes at night or under conditions with insufficient lighting; ZIV optics lenses are still capable of providing 100% protection against UVA/UVB even if they are transparent.

Polarized lenses are suitable for conditions with high color contrast, for instance, on a golf course looking at green objects or driving down on one-way street. This type of lens is capable of filtering unknown blue rays to avoid visual blur or distortion. 

When light is reflected off a mirrored surface, it is usually horizontal polarization. Light rays from horizontal polarization will be blocked out by the vertical polarizing film within the lens. 

Perspective Rate for Gray Lenses Electroplated with Black/Red REVO: 13.38%
Perspective Rate for Yellow Lenses: 88.33%
Perspective Rate for Tawny Lenses: 12.71%
Perspective Rate for Gray Lenses: 12.80%
Perspective Rate for Gray Lenses Electroplated with Blue REVO: 13.41%
Perspective Rate for Gray Lenses Electroplated with Mercury: 10.90%
Perspective Rate for Transparent Lenses: 88.63%
Indoor Perspective Rate for F76 Photochromic Gray Lenses is 75.909%, 43%~80% Outdoor Perspective Rate is 27.692%
Indoor Perspective Rate for F45 Photochromic Gray Lenses is 47.705%, 43%~80% Outdoor Perspective Rate is 15.177%
Description of Perspective Rate for Lenses
cat0 Perspective Rate 80%-100% is suitable for use at night and for poor lighting
cat1 Perspective Rate 43%-80% is suitable for use at evening or on cloudy days
cat2 Perspective Rate 18%-43% is suitable for use under any conditions during the day
cat3 Perspective Rate 8%-18% is suitable for use under strong light and during the day
cat4 Perspective Rate 3%-8% is suitable for use under strong light and during the day, but not suitable for use when driving 

Yes, all lenses of ZIV Sports Sunglasses feature 100% UV protection.

ZIV Sports Sunglasses featuring interchangeable lenses have two sets of backup lenses, where customers may use under different lightings. There is also a hard case for storing, as well as the ultra-fine fiber glasses pouch that may be used as a wipe cloth.

• Portable ZIV glasses case
• Two sets of interchangeable backup lenses
• Dirt-proof pouch

The rubber temple covers of some of the Sports Sunglasses are adjustable. Amongst these, the MATRIX series, SHARP series and SPEED series are three-time injection temples, where the temple cover and the temple are injected together to form a tight bond that will never fall apart; such injection method is unique in Taiwan, and is patent pending.
Taiwan Patent No.: TW-M350718   U.S. Patent No.: USA-7553017
The adjustable temple allows the user to adjust the comfort according to individual facial features.
Video demonstration on adjusting nose pads and temple covers for ZIV Sports Sunglasses

All ZIV frames are made with Swiss ultra-light technological memory plastic material, Grilamid. The material features flexibility and lightness, no pressure will be experienced when wearing; the material is tough, and will not break when used under normal conditions, providing complete safety protection.

• ZIV Sunglasses TR90 material torsion test

Giantec Co., Ltd.
info@ZIV.com.tw 
Tel：886-6-3840100
Fax：886-6-2818000
No.399, Sec. 2, Bentian Rd., Technology Industrial Park, Tainan City 70955

Method for installing and removing the two lenses
Removing lenses:
1. Face the glasses towards yourself and use your thumb and index finger to fix the position of the frame, then hold onto the inner end of the lens with the index finger and thumb of the other hand, pull the lens outwards gently to separate the inner end of the lens from the frame.
2. Pull the lens further downwards, the lens will then loosen from the groove of the frame.
3. Please repeat step I and step II to remove the other lens.
Installing lenses:
1. Please insert the top end of lens into the groove of the frame first.
2. Fix the frame using the thumb and the index finger, then hold onto the inner end of the lens using the thumb and the index finger of the other hand. Use both hands to move the lens upwards until the lens is clicked into the groove of the nose bridge.
3. Please repeat step I and step II to install the other lens.
4. Then use the lens cloth to clean the fingerprints on the lenses.

• Video demonstration on installing and removing the two lenses

Method for installing and removing the One-Piece lens
Removing lens:
1. Hold onto the center of the glasses, remove the lens from the center.
2. Remove the lens along the two sides of the lens to complete the removal.
Installing lens:
1. Place the two sides of the lens into the groove of the frame.
2. Place in the lens completely through the center to complete the lens installation.
Video demonstration on installing and removing the One-Piece lens

All of the Storm Lenses of ZIV Sports Sunglasses are anti-grease and anti-splash functional lenses, which will not allow water to adhere, making it more convenient and safer for exercising.