Ziena KAI Sunglasses | Size 52
Size Guide
Dark Tortoise
Dark Tortoise
Glossy Black
Ocean
Smoke
BlueByrd Blue Light - Level 3
- BlueByrd Blue Light - Level 3
Copper
Gray (12%)- Ultra Dark (0.5%) Waiver Required - Category 5
BlueByrd Blue Light - Level 2
Polarized Copper- Polarized Gray (11%)
Gray (12%) Bifocal +1.50- Gray (12%) Bifocal +2.00
- Gray (12%) Bifocal +2.50
Contrast Photochromic- Eclypse Photochromic
- DARKshift Photochromic
Your prescription is safe with us — you'll add it securely after checkout, with guidance at every step.
Product Details
Prefer clear lenses for everyday wear? Shop the Ziena KAI Eyeglasses version.
The Ziena KAI Sunglasses combine advanced dry eye relief technology with stylish sun protection. Featuring Ziena's signature moisture chamber design, these sunglasses shield your eyes from wind, dust, UV rays, and environmental irritants — making them ideal for outdoor activities and everyday wear.
- 100% UV400 protection
- Moisture chamber technology to reduce dry eye symptoms
- Shields eyes from wind, dust, and allergens
- Lightweight, comfortable frame for all-day wear
- Sleek, modern design for outdoor and everyday use
- Removable silicone moisture seal
Enjoy the outdoors without compromise — the Ziena KAI Sunglasses protect your eyes and keep them comfortable all day long.
Fit guide: The KAI is sized small to medium and is a universal fit. Ziena frames fit by how the frame curves to your face, not by frame measurements, so a measurement alone is not a reliable guide. A good fit seals about 95%, with a small gap left on purpose for ventilation, which helps reduce fogging. Fit can also change in two ways: prescription lenses change how the frame sits, and a new pair arrives at factory-default settings, so you may need to adjust the temple arms and nose pads to get the feel you're used to. Some fogging is normal if you perspire, because the small gap is there for ventilation; an anti-fog wax or gel can help.
Features
Included
Category Sunglasses
Age Group Adult
Gender Men,Women
Shape Rectangle
Rim Type Full-Rim
Prescription Ready
All measurements in millimeters.
All lenses are optically correct, de-centered and shatter resistant, with 100% UVA/UVB protection. Non-polarized lenses also get an anti-fog coating on the back.
| Lens | Light transmission | Polarized | Best for |
|---|---|---|---|
| Contrast Photochromic | 85% - 16% | No | Low light, overcast, shooting |
| BlueByrd Blue Light Blocker | 81% - 86% | No | Computer and screen use |
| Eclypse Photochromic | 80% - 18% | No | All day, indoors to outdoors |
| DARKshift Photochromic | 78% - 9% | No | One pair for very bright sun |
| Copper | 15% | No | Changing light, haze, extra contrast |
| Gray | 12% | No | Bright, sunny days |
| Polarized Gray | 11% | Yes | Glare from water, roads, snow |
| Polarized Copper | 10% | Yes | Driving, boating, golf |
| Extra Dark Gray 5.8% (Category 4) | 5.8% | No | Elevated light sensitivity |
| Extra Dark Gray 3.8% (Category 4) | 3.8% | No | Elevated light sensitivity |
| Ultra Dark 0.5% (Category 5) | 0.5% | No | Severe light sensitivity, outdoors |
Contrast Photochromic 85% - 16%
BlueByrd Blue Light Blocker 81% - 86%
Eclypse Photochromic 80% - 18%
DARKshift Photochromic 78% - 9%
Copper 15%
Gray 12%
Polarized Gray 11%
Polarized Copper 10%
Extra Dark Gray 5.8% (Category 4) 5.8%
Extra Dark Gray 3.8% (Category 4) 3.8%
Ultra Dark 0.5% (Category 5) 0.5%
We Pay Shipping on all orders over $99 in the USA
Canada 6-8 business days
U.K/International up to 14 business days
If, for any reason, you are not completely satisfied with your order, you may return it within the first 30 days*.
*Limitations apply
Please note
Prescription lenses will add an additional
Ziena KAI Sunglasses | Size 52
Dark Tortoise / BlueByrd Blue Light - Level 3 / Black
Product Size Information
Here are the key measurements for the eyewear you've selected.
* If the product is available in multiple sizes, please choose your size on the product page to view the exact measurements for that size.
1. Horizontal Lens Measurement
2. Vertical Lens Measurement
3. Bridge / Distance Between Lenses
4. Effective Lens Diameter
5. Temple Length
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