Ray-Ban has a wide selection of sunglasses, including the new Meta smart glasses. But sometimes, you just want a simple, classic style of shades.
If that’s your vibe, the Ray-Ban RB3721 sunglasses may be worth considering!
In this article, I’ll discuss the RB3721’s features and who the shades could work best for.
At a Glance
- Ray-Ban RB3721 sunglasses have a classic look that reaches back to the 1980s and ’90s.
- The sunglasses come with a variety of lens options, including dark gray and dark green.
- The Ray-Ban RB3721 sunglasses are available with or without polarization.
- If you’re looking for similar sunglasses that offer Chromance lenses, you could try the RB3686.
| Key Fact | Details |
| Model | Ray-Ban RB3721 |
| Best For | Everyday wear, classic sunglasses |
| Frame Shape | Square |
| Frame Material | Metal |
| Lens Width | 59 mm |
| Bridge Width | 17 mm |
| Arm Length | 145 mm |
| Lens Height | 45 mm |
| Prescription Capable | Yes |
| Style Highlight | Retro-inspired square frames |
| Ideal Face Shapes | Round, oval, and heart-shaped faces |
| Product | Typical Market Price | EZContacts Price | Savings |
|---|---|---|---|
| Ray-Ban RB3721 | $215–$267 | $166.03–$195.30 | Up to 38% |
What Is the Look of the Ray-Ban RB3721?

The RB3721 shades have a retro vibe. They feature large, bottom-heavy lenses that call back to popular eyewear styles from the 1980s and 1990s.
While the shape has some similarities to classic aviators, the RB3721 isn’t an aviator itself. It doesn’t have the double bridge typically associated with that style. Instead, the RB3721 has a square lens shape with curved lower rims and mostly flat top rims.
The frame has a simple construction without a lot of decorative details. That fits the RB3721’s understated design. The temples and nose bridge are high-set, which may be more comfortable for some shoppers. This is particularly true if you find lower nose bridges uncomfortable or irritating.
The overall look of the RB3721 is streamlined and classic. If you’re looking for something fancy or showy, they may not be right for you. However, if you like simple retro styles, they could be a great fit!
Who Should Consider the Ray-Ban RB3721?
Aside from shoppers seeking throwback styles, several types of sunglass customers might also want to consider this model:
- If you have a round or oval face, this style with square lenses could work well. The bottom-heavy lenses will also flatter heart-shaped faces.
- The temple size of 145 is larger than many sunglasses and may be a good fit for people with wider heads.
- Speaking of fit, Ray-Ban enthusiasts often like the brand because its frames are easy to adjust. If you don’t like the fit for any reason, there’s a good chance you can have an optician fix it for you.
What Lens Options Are Available for the Ray-Ban RB3721?

The Ray-Ban RB3721 features polycarbonate lenses. Polycarbonate is a lightweight, impact-resistant lens material. This makes it a practical choice for everyday sunglasses.
The sunglasses come with numerous color options. This includes:
- Dark gray
- Dark gray polarized
- Dark green
- Brown gradient
These lenses are all Category 3, making them a good choice for those looking for darker lenses. Sunglass lenses come in five categories. They are:
| Lens Category | VLT* | Best For |
|---|---|---|
| Category 0 | 80–100% | Very low light, fashion, indoor-to-outdoor use |
| Category 1 | 43–80% | Overcast or lightly cloudy conditions |
| Category 2 | 18–43% | Everyday use in moderate sunlight |
| Category 3 | 8–18% | Bright, sunny conditions; general outdoor use |
| Category 4 | 3–8% | Very intense sunlight, such as high mountains or snow |
*VLT = visible light transmission, or the percentage of visible light that passes through the lens.
Since the RB3721 sunglasses are Category 3 lenses, they’re designed for bright, sunny conditions and provide a substantial reduction in visible light.
All of Ray-Ban’s sunglasses also feature UV400 protection. This helps keep your eyes safe from harmful UVA and UVB rays.
Do the Ray-Ban RB3721 sunglasses come with polarized lenses?
Yes, there’s a dark gray option featuring polarized lenses. But whether you need polarized lenses or not depends on use.
Polarization is key to cutting glare, which can still be a problem with standard sunglasses. So if you frequently wear them in situations where glare is a problem, polarization is probably worthwhile.
For instance, people who like to fish or do water sports often struggle with glare reflecting off the water. Skiers have a similar problem with glare from snow.
On the other hand, polarized glasses aren’t as useful in low-light environments. They’re also not typically the best pick for sports like golf; they can distort depth perception and sometimes make it harder to judge precise distances.
They can also be problematic if you like to wear your shades indoors as well as outdoors, or go back and forth a lot. Polarized lenses can reduce light too much when indoors.
FAQs
What if I like the look of the RB3721 sunglasses, but I think Chromance lenses would work better for me?
Chromance lenses are premium lenses that combine polarization with contrast-enhancing spectral filters and a backside anti-reflective (AR) coating. These features are designed to reduce glare and enhance contrast. They can help you see details more clearly in bright conditions.
If you’re specifically looking for Ray-Bans with Chromance lenses, I would take a look at the Ray-Ban RB3686 sunglasses.

The look is similar to the RB3721, as they both have bottom-heavy lenses and simple temple arms. However, the browline is a bit more curved. There are two options for Chromance lenses available: Dark Green and Blue.
Are Ray-Ban RB3721 sunglasses good for driving?
The Ray-Ban RB3721 lenses can be good for daytime driving, particularly the options with polarized lenses. Polarization can help reduce glare from reflective surfaces, including roads and cars.
The standard lenses could also work well for driving, but they won’t have the same glare reduction.
