| XS | S | M | L | XL | XXL | |
| Men | 118-123 | 124-129 | 130-135 | 136-141 | 142-147 | 148+ |
| Women | 114-119 | 120-125 | 126-131 | 132-137 | 138-143 | 144+ |
| Kids | 107-112 (Infant) | 113-118 (Toddler) | 119-124 (Little Kids) | 125-130 (Big Kids) |
Oakley Flak Beta (Low Bridge Fit)
We currently don't have any in stock, but we can get you some.
This Product Has Been Discontinued
Explore our selection or chat with a Sports Optician to help you find the perfect product for your needs.
Free Shipping & Returns
Free Shipping & Returns
Free Shipping & Returns
Don't pay a cent for standard shipping ever again. Other shipping options are available. Learn More
Not 100% satisfied with your purchase? Return them within 45 days for a full refund or exchange. Learn More
See Better Guarantee
See Better Guarantee
See Better Guarantee
We understand prescription lenses are an investment in your vision. At SportRx, we go beyond premium brand names and prescription lenses. We give you friendly professionals to help you find what you need and 45 days to make sure you’re happy with your purchase. Your satisfaction is our promise, or your money back. Learn More
FSA & HSA Accepted
FSA/HSA ACCEPTED
FSA/HSA ACCEPTED
Flexible spending accounts (FSA), health savings accounts (HSA), and out-of-network vision insurance coverage can all be used towards awesome new prescription sunglasses, eyeglasses, and goggles. Learn More
Need Help With Fit or Prescription?
Talk with one of our friendly Sports Opticians.
PRODUCT OVERVIEW
Coverage
Sweatability
Prescription Friendliness
SportRx Frame Width™ 
136mm
136mmSportRx Frame Width™ (SFW) is the measurement our Sports Opticians use to find the most accurate fit possible. Unlike most eyewear measurements that have little to do with fit, SFW serves as an indicator for how well a frame or goggle will fit your face.
View Size & Fit GuideSPORTRX FIT GUIDE
SportRx Frame Width™ (SFW) is the measurement our Sports Opticians use to find the most accurate fit possible. Unlike most eyewear measurements that have little to do with fit, SFW serves as an indicator for how well a frame or goggle will fit your face.
SportRx Frame Width™ Chart
*All Sizes in MillimetersDETERMINING YOUR SFW
Use Eyeglasses and Not Sunglasses
Using flatter eyeglasses makes for a more accurate measurement. It takes a bit more finesse with wrapped sunglasses to get an accurate SFW measurement.
Have more than one pair?It never hurts to have more than one 'frame' of reference! If you have more than one pair that you love, you can measure multiple pairs and get an average.
Make sure the glasses fit!
Since we're using your glasses as a template for ideal fit, make sure they're a pair that are comfortable: not too wide, not too narrow. A quick glance in the mirror will show if the frames spread too far past the edges of your face or seem to 'pinch' it.
How/What do I measure?Measure with the temples opened out fully. Aim for right behind the hinge and measure from the inside of the frame material of one side to the inside of the other side.
FINDING YOUR BRIDGE FIT
Finding the right eyewear for your face means two things: the right frame size and the right bridge style. At SportRx, we have three different bridge styles:
Standard
A standard nose bridge is best for those with nose bridges that go higher than their pupils, or if you have more narrow cheekbones. Standard nose bridges are fixed and don’t include adjustable nose pads.
AdjustableAn adjustable nose bridge includes flexible nose pads that can be adjusted for a firm, yet comfortable hold. This style is best for those who prefer a more customizable fit.
Low-Bridge
The low-bridge fit is designed for those with narrow nose bridges or cheekbones higher than their nose bridge. Also called Asian Fit, this is a great choice if your frames tend to slide down or touch your cheeks.
Oakley Flak Beta performance sunglasses are a new addition to the Flak collection at Oakley. Oakley designed the Flak Beta sunglasses with its proprietary O Matter material to provide better comfort and durability. This pair of Oakley sunglasses has a sculptural design, similar to the Flak Draft sunglasses, and interchangeable lenses to allow the sunglasses to work in many different environments. Oakley’s Three-Point Fit system allows the lenses on the Flak Beta to stay in the perfect spot on your face, and its Unobtanium nose pads keep the sunglasses in place while you are sweating or performing a task. This asian fit version of the Flak Beta has larger nosepad and a slightly wider frame fit to keep the glasses from making contact with your eyelashes and cheeks. If you need Rx sport sunglasses, you can't go wrong with a pair of Oakley Flak Beta prescription sunglasses.
Benefits
Specialty Fit
Designed specifically to fit flatter nose bridges and higher cheekbones to keep frames from sliding down your nose or resting on your cheeks.
Color, Contrast, & Details
PRIZM lenses filter out distracting colors while highlighting details in your environment. The results? Increased vividness & improved reaction time.
Lightweight & Durable
O Matter frame material supplies a lightweight and comfortable fit with the durability needed to handle whatever you take on.
Secure & Effortless Fit
Frames that only touch points on your head that aid a comfortable fit. No more unwanted head pressure from your sunglasses.
Swap Between Multiple Lenses
With interchangeable lenses, you can swap out your lens with ease. Get fine-tuned performance for every sport you love, all wrapped into one killer frame.
Slip Free
Rubber nose pads keep your frames in place and optically aligned even as you sweat, jump, slide, bounce, you name it.
SIZE & FIT GUIDE
- Lens Measurements
1 - Lens Width: 65 mm
2 - Lens Height: 34 mm
- Frame Measurements
3 - Bridge Width: 17 mm
4 - SportRx Frame Width™ (SFW): 136 mm | Learn More
5 - Temple Arm Length: 131 mm
- Frame Fit
L | Not sure about frame fit? Frame Fit Guide
- Bridge Fit
Low Bridge Fit | Not sure about bridge fit? Bridge Fit Guide
TECH SPECS
- Frame Materials
- Nylon
- Safe from Harmful UV Rays
- Block carcinogenic ultraviolet (UV) light from reaching your eyes. With 100% UV protection, your eyes are safe from absorbing harmful sun rays.
- One Lens, Multiple Corrections
- Progressives allow you to see near and far in one pair of glasses. Vision in progressives feels natural with the multi-focal lens seamless transition.
- 8 Base
- A high wrap or wrap around frame. These types of glasses fit close to the sides of your face and provide additional peripheral coverage.
- Included Accessories
- Microfiber Bag
- Perfect For These Activities
- Baseball, Cycling, Driving, Fishing, Golf, Hiking, Hunting, Kayaking, Mountain Bike, Pickleball, Racquetball, Running, Shooting, Softball, Team Sports, Tennis, Triathlon, Volleyball
Oakley PRIZM™ LensesPRIZM™ lenses are fine-tuned to bring out the colors in any environment with its cutting-edge innovation that manipulates the light spectrum.
Oakley PRIZM™ Lenses
Oakley PRIZM™ is more than just a lens, it's a game-changer. With cutting-edge innovation that manipulates the light spectrum, PRIZM™ lenses are fine-tuned to bring out the colors in any environment. And when you factor in their options for sports, everyday, and snow, you're covered no matter your surroundings. See better than ever before when you look through PRIZM™.
See More with PRIZM™
ColorEnhances color recognition through boosted contrast to help you quickly spot what you need to see.
ContrastSharpens visual perception to help you see more clearly and react faster.
DetailOptimizes your ability to better see the important moving objects in your environment.
PRIZM™ SPORT
RoadEnhances vision in both bright light and shadows, helping riders quickly spot changes in the textures of road surfaces.
TrailEnhances Reds and Browns so riders can quickly spot sand, rocks, roots, and other terrain changes in shade and bright light.
FieldEnhances contrast and makes the ball stand out against the blue of the sky, the green of the grass, and the brown of the dirt.
GolfImproves contrast for better separation of color and giving golfers depth cues to gauge distance and grass conditions.
WaterPolarized lenses that combine maximum contrast, enhanced visibility, and glare reduction for ultimate performance on the water.
SnowIncreases contrast to help mountain enthusiasts identify terrain and spot snow contours in a variety of light conditions.
PRIZM™ EVERYDAY
Grey Base LensesGive colors a more natural appearance.
Bronze Base LensesGive a warmer appearance to colors.
SportRx Sport Optimized™ LensesAll Sport Optimized™ lenses come ready-made with advanced lens coatings for maximized clarity and contrast. These lenses feature multiple clear, tinted, polarized, and photochromic options.
SportRx Sport Optimized™ Lenses
SportRx Sport Optimized™ lenses cover every possible base so that you always have a quality lens no matter your intended use. With clear, tinted, polarized, and photochromic options, there's a Sport Optimized™ lens for everything under the sun - and indoors too! See the difference for yourself today.
The perfect lens. All the time.
CustomizationOur Sport Optimized™ lenses are uniquely functional, the ideal blend of our years of optical experience and knowledge of what performs best for each sport.
VersatilityNo matter what you're playing, there's a Sport Optimized™ lens for you. Be the boss of any environment or lighting condition.
High-TechAll Sport Optimized™ lenses come ready-made with advanced lens coatings designed to make your life SO much easier. See the difference yet?
PhotochromicThese Sport Optimized™ lenses use UV-based and light-reactive technology to change their tint so that you're perfectly equipped all day, every day.
PolarizedEliminate glare with these made-for-you Sport Optimized™ lenses. Whether you're fishing or driving, the days of annoying glare are far behind you.
Oakley Flak Beta (Low Bridge Fit) Reviews
*Results Vary From Person To Person
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