| 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) |
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Smith Longfin
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. Shipping Policy
Not 100% satisfied with your purchase? Return them within 45 days for a full refund or exchange. Return Policy
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™ 
135mm
135mmSportRx 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.
The SMITH Longfin is the quiver killer in SMITH’s fishing lineup. Megol side shields protect your eyes against backside glare while flexible temples keep you feeling comfortable all day on and off the water. All Longfin sunglasses come with ChromaPop™ polarized lenses for glare cutting and contrast enhancement you can depend on for your next waterborne adventure.
Benefits
Slip Free
Rubber nose pads keep your frames in place and optically aligned even as you sweat, jump, slide, bounce, you name it.
Secure Comfort
Rubber temples aid a secure and steady grip so your sunglasses can rest comfortably on your head.
Peripheral Protection
Wind, dust, and debris are no match for side shields. Keep your eyes comfortable and your vision clear with extra side shield protection.
SIZE & FIT GUIDE
- Lens Measurements
1 - Lens Width: 57 mm
2 - Lens Height: 43 mm
- Frame Measurements
3 - Bridge Width: 16 mm
4 - SportRx Frame Width™ (SFW): 135 mm | Learn More
5 - Temple Arm Length: 125 mm
- Frame Fit
M | Not sure about frame fit? Frame Fit Guide
- Bridge Fit
Standard | Not sure about bridge fit? Bridge Fit Guide
TECH SPECS
- Frame Materials
- Eco-Friendly
- 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.
- 6 Base
- The most common base curve for casual wear glasses. These types of glasses will have a slight curve to the lenses and frame, but are still fairly flat.
- Included Accessories
- Microfiber Bag
- Perfect For These Activities
- Athleisure, Boating/Sailing, Casual Lifestyle, Fishing, Golf, Hiking, Mountain Bike, Running, Sports, Water Sports
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.
Smith Longfin Reviews
*Results Vary From Person To Person
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