Free Shipping
Price Match
Easy Returns
Licensed Opticians
The Maui Jim KOKI BEACH MJ433 Sunglasses deliver what customers call an almost weightless wearing experience, thanks to the brand's lightest frame and lens combination. Named after Koki Beach—a hidden gem on Maui's east shore along the Road to Hana, where pink-tinted sands meet dramatic red cliffs—these sunglasses bring that same vibrant, natural beauty to your view.
MauiPure Lenses: Lightweight Clarity That Rivals Glass
The KOKI BEACH features MauiPure lens material, Maui Jim's most popular choice for good reason. These lenses combine optics almost as crisp as SuperThin Glass with ultra-lightweight construction and excellent scratch and shatter resistance. You get the visual clarity serious about sun protection demand, without the weight. The rounded rectangular shape fits medium faces comfortably, and the saddle-style bridge includes adjustable nose pads—a feature reviewers love for achieving a custom, no-slip fit that won't dig into your cheeks or pull hair when you push them up on your head.
"They are so lightweight that I forget I'm wearing them." — Zappos customer review
PolarizedPlus2 Technology: See the World in Brilliant Detail
Every pair of KOKI BEACH sunglasses features Maui Jim's patented PolarizedPlus2 lens technology, which goes far beyond basic polarization. The lenses eliminate 99.9% of glare and block 100% of harmful UVA and UVB rays, while a proprietary blend of three rare earth elements enhances red, green, and blue wavelengths. The result? Colors appear richer and more vibrant, contrast is sharper, and details pop—whether you're driving, golfing, or spending long days outdoors. The lenses also include anti-reflective coating on the backside to eliminate bounce-back glare, plus oleophobic and hydrophobic treatments that repel water, oil, and smudges for easy cleaning.
The MJ433 is available in three distinctive colorways: Black and Grey Tortoise with Neutral Grey lenses (ideal for bright, direct sunlight), Purple Tortoise with Maui Rose lenses (offering the highest contrast for fast-action activities), and Olive Tortoise with HCL Bronze lenses (a warm, versatile tint perfect for everyday variable conditions). The full-rim injected nylon frame is both durable and flexible, designed for extended wear without fatigue.
Prescription-Ready for Clear Vision
Need prescription lenses? The KOKI BEACH is compatible with Maui Jim's MauiPassport prescription program, available through authorized eye care professionals. You can add single vision or progressive lenses while retaining the full benefits of PolarizedPlus2 technology. Maui Jim sunglasses are recommended by the Skin Cancer Foundation as an effective UV filter for the eyes and surrounding skin, making them a smart choice for long-term eye health.
Product Details
Product DetailsModel
KOKI BEACHShape
Gender
Bridge Type
Rim Type
Age Group
Color Details
Color DetailsColor Code
11TColor Description
Black And Grey TortoiseLens Color
Neutral Grey
Frame Color
PurpleColor Code
28TColor Description
Purple TortoiseLens Color
Maui Rose
Frame Color
GreenColor Code
15TColor Description
Olive TortoiseLens Color
Hcl Bronze
Frame Color
GreenColor Code
15T20Color Description
Olive TortoiseLens Color
Hcl BronzeReading Power
2.0
Frame Color
PurpleColor Code
28T25Color Description
Purple TortoiseLens Color
Maui RoseReading Power
2.5
Frame Color
GreenColor Code
15T25Color Description
Olive TortoiseLens Color
Hcl BronzeReading Power
2.5
Frame Color
PurpleColor Code
28T15Color Description
Purple TortoiseLens Color
Maui RoseReading Power
1.5
Frame Color
PurpleColor Code
28T20Color Description
Purple TortoiseLens Color
Maui RoseReading Power
2.0
Frame Color
GreenColor Code
15T15Color Description
Olive TortoiseLens Color
Hcl BronzeReading Power
1.5
Size Details
Size DetailsBridge Width
16Temple Length
130Size
5616-130
Bridge Width
16Temple Length
130Size
5616-130
Bridge Width
16Temple Length
130Size
5616-130
Bridge Width
16Temple Length
130Size
5616-130
Bridge Width
16Temple Length
130Size
5616-130
Bridge Width
16Temple Length
130Size
5616-130
Bridge Width
16Temple Length
130Size
5616-130
Bridge Width
16Temple Length
130Size
5616-130
Bridge Width
16Temple Length
130Size
5616-130
California Proposition 65 Proposition 65 is a California regulation that requires special warnings to be presented to customers if a product contains certain quantities of chemicals or toxicants known to the State of California to cause cancer, birth defects, or other reproductive harm. The following warning applies to the products linking to this page:
WARNING: Reproductive Harm – https://www.p65warnings.ca.gov/Free Shipping within the contiguous US only (excluding Hawaii and Alaska) on all Orders over $100.
At DesignerOptics.com we are committed to the highest quality of service.
We ship products to all 50 US states as well as to many other countries around the world. We take all the measures to ship our items in a timely manner, directly to your door, almost anywhere in the world.
In stock products usually ship within two business days, but may take up to five business days*. When an order ships you will receive a confirmation email with the tracking information. You can also track your order by logging into your account.
We provide FREE SHIPPING on all orders over $100 We also offer overnight and second day delivery shipping options. Please note that when using next day or second day delivery it still takes 48 to 72 Business hours for the order to be processed.
The Designer Optics Low Price Guarantee is simple:
Designeroptics.com matches the price of all retail competitors and major online retailers.
How it works:
Place the frames in your cart
Before placing your order in add the following the comments box, Add the URL (web address) of the page where you found the lower-priced item,
Your credit card will not be charged until we have confirmed with you by phone or by email that your item qualifies for our Price-Match Guarantee.
Please Follow those easy steps for returns
1- Please fill out this form Return Authorization Form to get an RMA # you will receive a RMA # with instruction on how to return them within 48 to 72 Business hours from the time you submitted the form. Wait for our confirmation e-mail before shipping back the return
2- Send the product back to us following the instructions indicated in our e-mail and to the address we will provide you.
3- Make sure to confirm with us via e-mail the shipping date, the shipping service you used and the tracking number whenever you have
4- Include details of the return and how you would like for us to go about it (refund, store credit, exchange, etc). Designer Optics is not responsible for items damaged along the way.
Please allow us 3 to 5 business days from when items are received for us to process the refund. The amount to be refunded will not include shipping charges. if the order consists of 3 or more frames we will charge a 20% Restocking fee. otherwise only the shipping will be deducted.
Some exclusions may apply. Please note prescription lenses are final sale. We also do not accept returns on beauty products due to health and safety concerns. For more information please go to Returns
At Designer Optics, our skilled and experienced lab opticians play a crucial role in ensuring the quality and accuracy of your eyewear. With over 30 combined years of experience and full licensure, they review each prescription carefully and are equipped to answer any questions you may have.
Our state-of-the-art lab is equipped with the latest technology and equipment, including advanced edging and cutting technology, to produce lenses that are precise and accurate. Whether you need full frame or rimless lenses, our team is dedicated to providing the best possible results.
For personalized support, simply send an email to Support@designeroptics.com to request a call back from one of our friendly opticians.
Frequently Asked Questions
Are Maui Jim KOKI BEACH sunglasses prescription-compatible?
Yes, the KOKI BEACH MJ433 can be fitted with prescription lenses through Maui Jim's MauiPassport program. Most Maui Jim sunglasses are available with single vision or progressive prescription lenses that retain the full PolarizedPlus2 technology. Prescription orders must be placed through an authorized eye care professional, as prescription lenses are considered a medical device.
What is MauiPure lens material and why is it so lightweight?
MauiPure is Maui Jim's most popular lens material, combining optics almost as crisp as SuperThin Glass with ultra-lightweight construction and excellent scratch and shatter resistance. The KOKI BEACH uses MauiPure lenses paired with an injected nylon frame to create Maui Jim's lightest frame and lens combination. Customers consistently report the sunglasses are so light they forget they're wearing them.
What face size do the KOKI BEACH MJ433 sunglasses fit best?
The KOKI BEACH features a rounded rectangular frame shape that best fits medium face sizes (56mm lens width). However, customer reviews indicate they also work well for small faces thanks to the adjustable nose pads, which allow for a customized fit. The saddle-style bridge and lightweight design prevent the frames from sliding down or resting on cheeks, even during active wear.
How does PolarizedPlus2 technology differ from regular polarized lenses?
Maui Jim's PolarizedPlus2 technology eliminates 99.9% of glare and blocks 100% of UV radiation, but it also uses a patented blend of three rare earth elements to enhance color vibrancy and contrast. Unlike ordinary polarized lenses that simply darken your view, PolarizedPlus2 selectively filters light wavelengths to boost reds, greens, and blues while reducing harmful colors. The lenses also include anti-reflective, oleophobic, and hydrophobic coatings for maximum clarity and easy maintenance.
Which lens color should I choose for the KOKI BEACH sunglasses?
The KOKI BEACH is available in three lens options: Neutral Grey (best for bright, direct sunlight with the highest light reduction), HCL Bronze (a warm, high-contrast lens excellent for everyday variable conditions), and Maui Rose (provides the highest available contrast with a subtle rose tint, perfect for fast-moving sports and activities). Your choice depends on your primary use—driving and beach days favor Neutral Grey, while golfers and athletes often prefer Maui Rose for enhanced depth perception.
Do the KOKI BEACH sunglasses have adjustable nose pads?
Yes, the KOKI BEACH MJ433 features a saddle-style bridge with adjustable nose pads, which customers frequently cite as a major comfort advantage. The adjustable pads allow you to customize the fit to prevent the frames from resting on your cheeks, sliding down when you perspire, or pulling hair when worn on top of your head. This design contributes to the all-day comfort that makes these sunglasses ideal for extended outdoor wear.
Compare With Similar Frames
How the Maui Jim KOKI BEACH MJ433 Sunglasses stacks up against the closest alternatives we carry.
- Larger 59mm lens width fits medium to large faces better
- Same ultra-lightweight MauiPure lens material
- Identical adjustable nose pad system
- Lower price point ($176-$179)
- Lightweight construction ideal for all-day wear
- Full PolarizedPlus2 lens technology
- Compatible nose pad system for customized fit
- Similar price range ($192-$207)
- Lightweight frame construction
Read the full comparison
KOKI BEACH vs. RED SANDS vs. SANDY BEACH: Which Maui Jim Is Right for You?
If you're drawn to the ultra-lightweight feel and vibrant PolarizedPlus2 clarity of the KOKI BEACH MJ433, you might also be considering a few similar Maui Jim models. Here's how they stack up.
KOKI BEACH MJ433 vs. RED SANDS MJ432: Size Matters
The RED SANDS MJ432 is essentially the KOKI BEACH's bigger sibling. Both frames share the same lightweight MauiPure lens material, adjustable saddle-bridge nose pads, and injected nylon construction. The key difference? Lens width. The KOKI BEACH measures 56mm, making it ideal for small to medium faces, while the RED SANDS comes in at 59mm—a better fit for medium to large faces. They're even compatible with the same replacement nose pads, confirming they share the same frame platform.
If you have a smaller face or prefer a more compact frame, the KOKI BEACH is your best bet. Reviewers with petite features specifically praise how well the 56mm width fits without overwhelming their face. But if you've found other 56mm frames too snug, or if you have a wider face, the RED SANDS offers the same featherlight comfort in a roomier package. Both are available in the same lens colors—Neutral Grey, HCL Bronze, and Maui Rose—so your choice comes down purely to fit.
KOKI BEACH MJ433 vs. SANDY BEACH MJ408: Premium vs. Value
The SANDY BEACH MJ408 is another lightweight, beach-inspired Maui Jim frame with a rounded shape and full PolarizedPlus2 technology. At $176-$179, it's about $20-$60 less than the KOKI BEACH, making it an attractive option if you're budget-conscious. However, the KOKI BEACH's adjustable nose pads give it a significant edge in customization and all-day comfort—a feature customers consistently cite as a game-changer for preventing slippage and pressure points.
If you prioritize the absolute lightest weight and the ability to fine-tune your fit, the KOKI BEACH is worth the modest premium. But if you're looking for excellent Maui Jim optics and don't need the adjustability, the SANDY BEACH delivers outstanding value.
KOKI BEACH MJ433 vs. POKOWAI ARCH MJ439: Adjustability Equals
The POKOWAI ARCH MJ439 shares the KOKI BEACH's adjustable nose pad system, making it another strong choice if customized fit is your priority. Priced similarly at $192-$207, it offers the same level of comfort engineering. The main difference is frame shape and aesthetic—the POKOWAI ARCH has a distinct look that may appeal to different style preferences.
Choose the KOKI BEACH if you love the rounded rectangular shape and the multiple tortoise colorway options. Opt for the POKOWAI ARCH if you prefer its specific frame design but still want that signature adjustable, lightweight Maui Jim fit.
Our Recommendation
For small to medium faces seeking the ultimate in lightweight comfort with adjustable fit, the KOKI BEACH MJ433 is the clear winner. Its 56mm lens width, featherlight MauiPure lenses, and customizable nose pads make it one of Maui Jim's most comfortable all-day frames. If you need a larger fit, step up to the RED SANDS MJ432. And if you're on a tighter budget but still want premium Maui Jim optics, the SANDY BEACH MJ408 offers excellent value.
At a Glance
Maui Jim RED SANDS MJ432 Sunglasses
Pros:
- Larger 59mm lens width fits medium to large faces better
- Same ultra-lightweight MauiPure lens material
- Identical adjustable nose pad system
- Available in same lens color options
Cons:
- Slightly higher price range ($199-$239)
- May be too large for petite or small faces
- Less suitable if you prefer a more compact frame
Maui Jim SANDY BEACH MJ408 Sunglasses
Pros:
- Lower price point ($176-$179)
- Lightweight construction ideal for all-day wear
- Full PolarizedPlus2 lens technology
- Rounded frame shape flatters similar face types
Cons:
- Different frame design may not offer the same adjustability
- Fewer color options than KOKI BEACH
- May use different lens material depending on variant
Maui Jim POKOWAI ARCH MJ439 Sunglasses
Pros:
- Compatible nose pad system for customized fit
- Similar price range ($192-$207)
- Lightweight frame construction
- Full PolarizedPlus2 technology
Cons:
- Different frame shape may not suit all face types
- Potentially different lens material
- Less color variety than KOKI BEACH