Ray-Ban 3721CH Sunglasses
Ray-Ban 3721CH Sunglasses
$228.00

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Ray-Ban 3721CH Sunglasses

186/5J - Black - Grey

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DESCRIPTION RATINGS & REVIEWS PRESCRIPTION GUIDE

The Ray-Ban RB3721CH Chromance sunglasses bring advanced lens technology to a modern square metal frame. Built for those who want more than basic glare reduction, these sunglasses feature Ray-Ban's Chromance polarized lenses—engineered to enhance color vibrancy, sharpen contrast, and deliver superior visual clarity in bright outdoor conditions.

Chromance Lens Technology: Polarization Plus Enhanced Color

Standard polarized lenses cut glare. Chromance lenses go further. Ray-Ban's Chromance technology combines polarization with a six-layer anti-reflective coating and proprietary high-contrast pigments that filter light to make colors appear richer and more separated. The result is noticeably sharper detail—whether you're on the water, driving, or hiking—with reduced eye strain even in high-glare environments. The lenses block 100% of harmful UVA and UVB rays and are crafted from impact-resistant polycarbonate for durability.

Available in multiple mirrored finishes including blue mirror, green/gold gradient, and grey, each Chromance lens is designed to optimize light transmission for vivid color perception. The polarization eliminates horizontal glare from reflective surfaces like water, snow, and pavement, while the Chromance treatment enhances reds, greens, and blues for a more immersive view.

Lightweight Metal Construction & Comfort Features

The RB3721CH features a full-rim stainless steel frame in a contemporary square shape (59mm lens width, 17mm bridge, 145mm temples). The frame front is metal, but the temples incorporate injected plastic tips for a secure, comfortable grip that won't slip during activity. This hybrid construction keeps the overall weight low while maintaining structural integrity.

The square lens shape offers wide coverage and suits medium to large face sizes. Adjustable nose pads ensure a customized fit. Frame finishes include black on silver, black on gold, black on black, and brown on gunmetal—each paired with complementary Chromance lens tints.

Prescription-Ready & Versatile

These sunglasses are fully prescription-ready and compatible with single vision, bifocal, and progressive lenses. The full-rim design provides excellent lens security and accommodates a wide range of prescriptions. Whether you need them as everyday sunglasses or prescription sunwear, the RB3721CH delivers both style and optical performance.

Each pair ships with a Ray-Ban case and cleaning cloth. The unisex design works equally well for men and women seeking a bold, modern square frame with premium lens technology.

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Customer Reviews

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M
Morgan Lemon
Wrong color frame was sent

I put in the exact model number of what I was looking for and was sent a completely different color. I have tried getting a hold of the company. Still waiting on a response.

Frequently Asked Questions

What is Ray-Ban Chromance lens technology and how is it different from regular polarized lenses?

Chromance lenses are Ray-Ban's premium polarized lenses that go beyond standard glare reduction. They feature a six-layer anti-reflective coating and proprietary high-contrast pigments that enhance color vibrancy and sharpen visual detail. While regular polarized lenses eliminate glare, Chromance lenses also amplify colors and improve contrast, making them ideal for outdoor activities where visual clarity matters—like fishing, water sports, driving, and hiking.

Are the Ray-Ban 3721CH sunglasses prescription-ready?

Yes, the RB3721CH is fully prescription-ready and compatible with single vision, bifocal, and progressive lenses. The full-rim metal frame provides excellent lens security and can accommodate a wide range of prescriptions. Ray-Ban's prescription lenses are crafted with the same attention to quality as their non-prescription sunglasses, utilizing advanced optical technology for clear, sharp vision.

What size are the Ray-Ban RB3721CH sunglasses?

The RB3721CH measures 59mm lens width, 17mm bridge width, and 145mm temple length (59-17-145). This is considered a large fit and suits medium to large face sizes. The square lens shape offers wide coverage, and the frame includes adjustable nose pads for a customized, comfortable fit.

What material is the RB3721CH frame made from?

The frame is constructed from lightweight stainless steel metal with a full-rim design. The temples feature injected plastic tips (sometimes called Liteforce material) for added comfort, extra grip, and reduced weight. This hybrid construction combines the durability of metal with the comfort and secure fit of injected plastic temple ends.

Do Ray-Ban Chromance lenses provide UV protection?

Yes, all Ray-Ban Chromance lenses block 100% of harmful UVA and UVB rays. In addition to UV protection, the polarized Chromance lenses eliminate glare, reduce eye strain, and are made from impact-resistant polycarbonate material for durability and safety.

What lens color options are available for the RB3721CH?

The RB3721CH is available in four Chromance lens options: grey polarized (black on black frame), blue mirror polarized (black on silver frame), blue/gold mirror polarized (black on gold frame), and green/gold mirror polarized (brown on gunmetal frame). Each lens features the Chromance treatment for enhanced color and contrast, with different mirror finishes to suit various light conditions and style preferences.

Compare With Similar Frames

How the Ray-Ban 3721CH Sunglasses stacks up against the closest alternatives we carry.

Read the full comparison

Ray-Ban 3721CH vs. Similar Metal Frames

If you're considering the RB3721CH Chromance sunglasses, you might also be weighing other Ray-Ban metal frames. Here's how the 3721CH compares to two popular alternatives in our collection.

RB3721CH Chromance vs. RB3716 Clubmaster Metal

The Ray-Ban Clubmaster Metal 3716 ($144-$276) offers the iconic browline design in a lightweight metal frame. While both models feature quality metal construction and are prescription-ready, the key difference is lens technology and style. The 3721CH features Chromance polarized lenses with enhanced color and contrast—technology not available on the 3716. The 3716's browline design is more retro and may suit those seeking a classic look, while the 3721CH's square shape is more contemporary and offers wider lens coverage for better sun protection. If you prioritize advanced lens performance and a modern aesthetic, the 3721CH is the stronger choice. If you prefer the timeless Clubmaster look and don't need Chromance technology, the 3716 is a solid option at a slightly lower price point.

RB3721CH Chromance vs. RB3548N Hexagonal

The Ray-Ban Hexagonal 3548N ($143-$244) is another geometric metal frame with flat lenses, but the similarities end there. The 3548N's hexagonal lens shape is more fashion-forward and distinctive, while the 3721CH's square shape is sportier and more versatile. The critical difference is again the lens technology: the 3721CH's Chromance lenses deliver superior color enhancement and contrast compared to the 3548N's standard lens options. The 3721CH also features injected temple tips for a more secure fit during activity, making it better suited for outdoor sports. Choose the 3548N if you want a unique geometric look for casual wear; choose the 3721CH if you need performance-oriented lenses and a frame that works equally well for active pursuits and everyday style.

Why Choose the RB3721CH?

The RB3721CH stands out for its Chromance lens technology—Ray-Ban's most advanced polarized lens system. If you spend significant time outdoors, especially on or near water, or if you're sensitive to glare while driving, the enhanced color and contrast of Chromance lenses make a noticeable difference. The square metal frame is also more versatile than niche styles, working well for both active and casual settings. At $285, you're paying for premium lens technology that standard polarized lenses can't match.

At a Glance

Ray-Ban Clubmaster Metal 3716 Sunglasses

Pros:

  • Iconic Clubmaster browline design with retro appeal
  • Lightweight metal construction
  • Available with polarized lens options
  • Slightly lower starting price point

Cons:

  • Smaller lens coverage than the square RB3721CH
  • Does not offer Chromance lens technology
  • Browline style may not suit all face shapes
  • Less modern aesthetic compared to the square frame

Ray-Ban Hexagonal 3548N Sunglasses

Pros:

  • Unique hexagonal lens shape stands out
  • Flat lens design similar to RB3721CH
  • Lightweight metal frame
  • Comparable price range

Cons:

  • Does not offer Chromance lens technology
  • Smaller lens size may provide less coverage
  • Hexagonal shape is more fashion-forward and may not suit all preferences
  • Less sporty/performance-oriented than the RB3721CH

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