1. Overview
The FEIDUSUN A01-matte Black / Black Polarized Sunglasses are designed for both men and women, offering a classic square frame with advanced lens technology. These sunglasses are engineered to provide superior eye protection and visual clarity during various outdoor activities.
Key Features:
- Classic Square Frame Design: Features a timeless retro square aesthetic suitable for various face shapes and styles.
- UV Protection: Equipped with TAC lenses that block 100% of harmful UVA and UVB rays (UV400 protection), safeguarding your eyes from long-term sun damage.
- HD Polarized Lenses: Reduces glare from reflective surfaces like roads, water, and snow, enhancing visual comfort and restoring true colors.
- Lightweight and Durable Construction: Made from a special, lightweight yet strong material (TR90) for increased flexibility and durability, reducing pressure on the nose and ears.
- Comfortable Fit: Designed for a secure and comfortable fit, suitable for extended wear during activities such as driving, fishing, hiking, and cycling.

Figure 1: FEIDUSUN A01-matte Black / Black Polarized Sunglasses.
2. Setup
Your FEIDUSUN sunglasses come ready for immediate use. No assembly is required.
Unboxing and Initial Inspection:
- Carefully remove the sunglasses from their packaging.
- Inspect the frames and lenses for any signs of damage or manufacturing defects.
- Use the provided soft cloth to gently clean the lenses before first use.

Figure 2: Unboxing the FEIDUSUN sunglasses.
3. Operation
These sunglasses are designed for comfortable and effective use in various bright light conditions.
Wearing the Sunglasses:
- Gently place the sunglasses on your face, ensuring the nose pads rest comfortably on your nose bridge and the temples extend over your ears without pinching.
- Adjust the position slightly to ensure optimal coverage and a clear field of vision.
Benefits of Polarized Lenses:
The polarized lenses significantly reduce glare, which is particularly beneficial in environments with reflective surfaces. This improves visual clarity and reduces eye strain.

Figure 3: Visual comparison demonstrating the effect of polarized lenses on glare reduction.
Recommended Uses:
- Driving: Reduces glare from the road and other vehicles, improving visibility and safety.
- Fishing & Water Sports: Minimizes glare off the water surface, allowing for better visibility into the water.
- Hiking & Cycling: Provides clear vision and UV protection in various outdoor terrains.
- General Outdoor Activities: Ideal for any activity where sun protection and glare reduction are desired.

Figure 4: Sunglasses are suitable for various outdoor activities.
4. Maintenance
Proper care will extend the life and maintain the performance of your FEIDUSUN sunglasses.
Cleaning Instructions:
- Use the provided soft microfiber cloth to clean the lenses. Avoid using paper towels, clothing, or abrasive materials, as these can scratch the lenses.
- For stubborn smudges, lightly dampen the microfiber cloth with water or a specialized lens cleaning solution. Avoid harsh chemicals.
- Gently wipe the lenses and frame until clean and dry.
Storage:
- Always store your sunglasses in a protective case or pouch when not in use to prevent scratches and damage.
- Avoid leaving sunglasses in direct sunlight for extended periods, especially in hot environments like a car dashboard, as extreme heat can warp the frame or damage the lens coating.

Figure 5: Always use a soft cloth for cleaning and store in a protective pouch.
5. Troubleshooting
Here are solutions to common issues you might encounter:
| Issue | Possible Cause | Solution |
|---|---|---|
| Lenses appear blurry or smudged | Dirt, oils, or improper cleaning. | Clean lenses with the provided microfiber cloth and, if necessary, a specialized lens cleaning solution. |
| Sunglasses feel uncomfortable or pinch | Improper fit or prolonged wear without adjustment. | Adjust the position on your nose and ears. The flexible frame material (TR90) should adapt comfortably. |
| Reduced polarization effect | Viewing through non-polarized screens (e.g., some car displays, phone screens) or extreme angles. | This is normal for polarized lenses. The effect is most noticeable when viewing reflective surfaces directly. |
6. Specifications
| Feature | Detail |
|---|---|
| Brand | FEIDUSUN |
| Model Number | 00100shahei |
| Color | A01-matte Black / Black |
| Item Shape | Square |
| Frame Material Type | Plastic (TR90) |
| Lens Material Type | Plastic (TAC) |
| Lens Coating Description | UV Protection Coating (UV400) |
| Polarization Type | Polarized |
| Ultraviolet Light Protection | True |
| Recommended Uses | Driving, Fishing, Hiking, Cycling |
| Fit Type | Universal |
| Arm Length | 143 Millimeters |
| Bridge Width | 15 Millimeters |
| Lens Width | 52 Millimeters |
| Target Audience | Unisex-Adults |

Figure 6: Product dimensions for optimal fit.
7. Warranty and Support
FEIDUSUN is committed to providing excellent customer service and product quality.
Customer Service:
All FEIDUSUN customers receive comprehensive customer service for their polarized sunglasses. The quality of each product is double-checked by a third-party company.
Lifetime Support:
FEIDUSUN offers lifetime support for its products. If you have any questions or concerns, please do not hesitate to contact us. We are dedicated to ensuring your satisfaction.
For further assistance, please refer to the contact information provided with your product packaging or visit the official FEIDUSUN website.





