The king of summer fashion accessories that is popular around the world – sunglasses. It can be said that everyone has sunglasses, whether when you drive a car or a travel. When you buy sunglasses, do you know what is parts of sunglasses? which material is best, and I will tell you some amazing insider information about this industry.

Parts of Sunglasses

First, you need to understand the parts of sunglasses, generally speaking, a pair of sunglasses composed by the lenses, frame, nose pads, temples, and hinges.


Sunglass lenses are different from ordinary eyeglass lenses. Sunglass lenses can protect your eyes from damage that can occur from exposure to the sun’s ultraviolet (UV) rays. Especially in the U.S., retailers selling sunglasses are required by law to state how much UV protection sunglasses provide. 

When you’re looking for sunglasses, check to make sure there is a sticker on the lens or a label that says they have 100% protection from UVA-UVB rays. The sticker might indicate that the glasses are rated UV 400. This means the lenses block almost 100% of damaging UV rays. Accorrding to research, 75% to 90% of visible light should be blocked by the sunglass lenses.

Features of Sunglass Lenses

UV Protection

High-quality sunglasses should block 99% to 100% of UVA and UVB rays to prevent eye damage. I advise you to choose the labels indicating UV 400 or 100% UV protection​.

Visible Light Transmission (VLT)

This measures the amount of visible light that passes through the lenses. For general use, lenses that block 75% to 90% of visible light (10% to 25% VLT) are ideal. This range helps reduce glare and eye strain in bright conditions​.


Polarized lenses reduce glare from reflective surfaces like water, snow, and glass, suit for driving, fishing, and skiing​. But, It is not advisable to wear polarized lenses when driving at night or when the road is icy.

Lens Coatings

These can include anti-reflective coatings to reduce glare, hydrophobic coatings to repel water, and anti-scratch coatings to increase durability.

Types of Sunglass Lenses

Polarized Lenses

Polarized lenses can significantly reduce glare. Polarized sunglasses are a great option if you enjoy water sports or are particularly sensitive to glare.

Polarized Lenses
Polarized Lenses

Photochromic Lenses

These lenses darken when exposed to UV rays and return to clear when indoors. But, don’t use in car.

Photochromic Lenses
Photochromic Lenses

Gradient Lenses

These lenses are tinted from top to bottom, with the top being darker. This design helps reduce overhead sunlight, allowing more light to come through the bottom when you driving and outdoor activities.

Gradient Lenses
Gradient Lenses

Mirrored Lenses

These have a reflective coating on the outside that reduces the amount of light entering the eyes. They are often used in snow and water​ high-glare environments.

Mirrored Lenses
Mirrored Lenses

Tinted Lenses

With various colors and different benefits, such as yellow lenses, it is suit for overcast or foggy days.

Tinted Lenses
Tinted Lenses

Materials of Sunglass Lenses


Glass offers superior scratch-resistance. But, it’s heavy and expensive. Glass will “spider” when impacted, but not chip.


Polyurethane provides superior impact-resistance and excellent optical clarity. It’s very lightweight, but expensive.


Polycarbonate has excellent impact-resistance En cheaper than polyurethane. It’s lightweight, but less scratch-resistant.


Acrylic is an cheap alternative to polycarbonate, best suited for casual or occasional-use sunglasses.


Styles of Sunglasses Frame

Wayfarer (square style)

The classic square frame design is suitable for a variety of face shapes and is a very popular style. Can be divided into half frame and full frame.

Square Sunglasses
square sunglasses


A classic style with a double bridge design and large lenses, derived from aviator glasses, giving it a fashionable and adventurous feel.

Aviator Sunglasses
Aviator sunglasses


Round frame design, often with a retro style, suitable for people who want to show their personality.

Round Sunglasses
Round sunglasses

Cat-eye (cat-eye style)

The upturned shape gives people an elegant and sexy feeling, suitable for people who want to show off their feminine charm.

Cat-Eye Style Sunglasses
cat-eye style sunglasses


A design with larger lenses and frames, highlighting individuality and fashion.

Oversized Sunglasses
Oversized sunglasses

sunglasses clip

These are frameless sunglasses, with the lenses clipped directly onto ordinary glasses.

Materials of Sunglass Frame

Materials Of Sunglass Frame
Materials of Sunglass Frame

Plastic Frame

Plastic frames are lightweight, low-priced, and can be used for various styles of sunglasses. Common plastic materials include cellulose acetate, nylon, and polycarbonate. Has certain elasticity and durability.

Metal frame

sturdy and durable, with more designs. Metal frames typically use materials such as titanium, aluminum, stainless steel, or alloys. But metal frames can be heavier.

Titanium alloy frame

Titanium alloy is light, corrosion-resistant, and is a high-end option. But it is also the most expensive.

Wooden frame

Made of natural wood or wood composite materials, each frame has a unique texture and color. But it is not strong and requires high moisture and temperature.

Nose Pads

The nose pad is the part of the sunglasses that rests on the nose. They are designed to distribute the weight of the sunglasses across the bridge of the nose.

Parts Of Sunglasses - Nose Pads
Parts of Sunglasses – Nose Pads


They are the long rod-like parts on the sides of the frame that extend above the ears. Temples come in different lengths because everyone’s head size is different.

Parts Of Sunglasses - Temples
Parts of Sunglasses – temples


Parts Of Sunglasses - Hinges
Parts of Sunglasses – hinges

As parts of sunglasses, hinges is important, make you can open and close the temples. One part is attached to the frame and the other part is attached to the temple. Hinges have many types.

Interlocking Hinge:

It is the most common type. consists of two metal parts that interlock and are held together by screws.

Spring Hinge:

There is a spring mechanism that allows the temples to expand outward.

Hidden hinge:

The hinge design is hidden inside the frame and cannot be seen from the outside. But this kind of hinge is very troublesome to repair.

Some Amazing Insider Information in Industry of Sunglasses

In fact, the sunglasses is a profits industry. Sunglasses often have a very high markup. The production cost of a pair of designer sunglasses can be as low as $10-$20, but they can sell for hundreds of dollars. This significant markup is due to branding, marketing, and the perceived value of luxury goods.

Especially in the lenses, many sellers confuse the materials of lenses to fool uninformed outsiders, replace polyurethane with inferior materials, and then sell them at high prices. If buyers do not have a good strategy and do not know which lenses is suitable for them, they will be deceived.

Some sunglasses say they protect your eyes from UV rays, but they don’t. They can actually harm your eyes. Some sunglasses are fake designer sunglasses. They look like high-end brand sunglasses, but they’re not. They’re fake. Some use partially polarized technology, only part of the lens has a polarizing film. This technology is a mix of true and false.

How to Avoid Sunglasses Scams

Then, how to avoid these scams? Here give you some tips:

  • Buy from the right sources: Buy sunglasses from reputable retailers, opticians or directly from the brand’s official website.
  • Check reviews: Refer to real buyer reviews to identify authenticity.
  • Test lenses: If possible, verify UV protection using a simple test, or ask an optician for professional verification.

If you want to wholesale sunglasses from China, or just buy for yourself, NEEM CONTACT MET ONS OP, we can help you import from China, and of course verify the supplier, choose a reliable factory for you, you needn’t to worry about anyting. Start your business and make money right now.

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