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SunGod Forty2s running sunglasses review: Now I understand why the pros wear them
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What are the SunGod Forty2s?
The SunGod Forty2s running sunglasses are surging in popularity, boosted by athletes endorsement at major events. British brand SunGod designed the Forty2s as a refined alternative to bulkier sports eyewear, great for Parkruns or marathons. At £110, they're more affordable than luxury rivals, yet pricier than basic sports shades, making them a compelling mid-market option.
Key features include SunGod's advanced 8KO nylon lenses, providing up to 70 per cent greater clarity than standard polycarbonate and complete UVA/UVB protection. Frames crafted from recycled materials appeal to eco-conscious buyers. The Forty2s offer a secure, zero-bounce fit with hydrophilic nose grips that tighten as you sweat, plus ergonomic ear socks and built-in airflow vents to prevent fogging. Innovative pop-lock hinges enhance durability, while interchangeable nose pads allow customisation.
With their smart design combining performance and style, the SunGod Forty2s are a standout choice for runners seeking both quality and practicality.
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How we test running sunglasses
I put the SunGod Forty2s through real world testing to see how they performed in everyday running conditions. First, I assessed fit and comfort over varied routes including sprints, long runs and hill sessions, noting if the sunglasses stayed secure or needed adjustment. The recent UK heatwave provided the right conditions to test the hydrophilic nose grips, special pads that get stickier as sweat increases, and ergonomic ear socks, which securely hold the glasses in place.
For durability, I conducted a standard drop test, letting the sunglasses fall from head height onto hard surfaces, mimicking a typical mid-run fumble. Lens clarity was tested under varying lighting conditions, from bright sun light to shady trails, to see how effectively they adapted.
Ventilation and fog resistance were assessed during humid and sweaty runs, observing if any misting occurred. After each outing, I carefully placed the glasses back into their protective case, ready for the next test or a quick inspection.
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Lens technology
Score: 8/10
Although the SunGod Forty2s don't come with polarised lenses, which help cut glare, I never felt at a disadvantage, even in the brightest sunshine. For me, the real magic is in their 8KO lenses, which SunGod say are a high-performance lens technology that gives you clearer, tougher vision than the usual polycarbonate lenses. I found the dark tint on these lenses did a great job blocking 100 per cent of harmful UV rays and really took the edge off the brightness. I never once had to squint or strain to see my surroundings.
SunGod insists these glasses are suitable for cycling, hiking, golf and even skiing – and I can see why. If you're like me and want eyewear that's robust and reliable enough to keep up with whatever sport you throw at it, this kind of versatility is exactly what I look for in a pair of sunglasses.
Fit and comfort
Score: 10/10
When it comes to comfort, a crucial factor for any runner, the SunGod Forty2s are a revelation. At just 28 grams, their featherweight design means I barely noticed them on my face, even after hours on rough trails or steep inclines. The large, moisture-gripping nose pads, which use hydrophilic material to stick better as you sweat, kept the glasses secure and bounce-free, even during the sweatiest workouts. Remarkably, there were no unsightly pressure marks left behind after long runs – a common gripe with other brands.
Initially, the arms felt a touch tight, but after a few outings, they relaxed to fit my head snugly without discomfort. The Forty2s also offer interchangeable nose pads (three options included), making them adaptable for a wide range of head shapes and sizes, which is a thoughtful touch for fuss-free, personalised comfort.
Durability and impact resistance
Score: 9/10
The frame of my SunGod Forty2s is made from 100 per cent recycled TR90 (thermoplastic resin 90, a lightweight, flexible plastic known for being tough and impact-resistant). I gave them a proper drop test: the frame popped off the lenses a bit, but I just snapped it back in place. The scratch-free nylon lenses stayed pristine, even after a few knocks.
I'm especially impressed by the pop-lock screwless snap hinges, which keep the arms secure even with rough handling or the occasional clumsy drop. And yes, my running shoes have ended up crushing my glasses before; the Forty2s survived, while regular glasses would have crumbled.
SunGod's confidence in its product is obvious as it's backed with a lifetime guarantee. Plus, the recycled frame means I can feel good about my eco-friendly choice, without sacrificing performance.
Lens clarity and visual enhancement
Score: 10/10
I was genuinely struck by the clarity of the SunGod Forty2s. There wasn't a single run where I struggled to see what was ahead, no matter how bright the sun. SunGod claims its slim, two-millimetre nylon lenses offer up to 70 per cent more clarity than standard options, and that tracks: everything stayed crisp, whether I was in open, sunlit spaces or darting between London's towering buildings and various shadows.
Even in woodland, where light levels jump all over the place, the glasses kept my vision sharp and consistent. Honestly, I often forgot I was wearing them, a sure sign that I could see everything clearly all the time.
Ventilation and fog resistance
Score: 10/10
You might wonder if running sunglasses without anti-fog coating are worth your time. But with the SunGod Forty2s, I never had a single issue with foggy lenses, even when I was dripping sweat in the summer heat. The trick is in the clever little airflow channels (tiny vents near the top of the lenses) that keep air moving and prevent any condensation from building up. My only gripe? The occasional smudge from my own sweaty fingers when I took them off.
The nose pads deserve another shout-out: they didn't slip a millimetre, no matter how wet my nose got. All in all, these sunglasses proved that smart design can beat fancy coatings any day, keeping my vision clear and my run frustration-free.
Technical specifications
Oakley sunglasses, such as the Oakley Radar Plate, are the gold standard in performance eyewear, but aside from the cheaper price, the SunGod Forty2s just about steal the crown for me thanks to their attractive design and all-day comfort.
Should you buy the SunGod Forty2s?
If you're after running sunglasses that are featherlight, stay put in any weather, and never fog up, the SunGod Forty2s are a standout choice. Their 8KO nylon lenses deliver superb clarity and full UV protection, while the recycled frame and modular design make them both sustainable and customisable for any head shape. With a bounce-free fit, clever airflow and a lifetime guarantee, they're well worth the investment.
Yes, if:
You want a pair of running sunglasses that allow you to see clearly in varying lights
You're after comfort, style and performance
No, if:
You prefer polarised or coloured lenses
You'd rather have smaller lenses
SunGod Forty2s running sunglasses FAQs
What makes the SunGod Forty2s different from other running sunglasses?
The big difference with the SunGod Forty2s is that they tick every box. With ultra-clear 8KO lenses, a lightweight recycled frame, anti-fog ventilation and a secure zero-bounce fit, these won't let you down.
Are the SunGod Forty2s comfortable and secure for long runs?
Yes, they're ultra-light, weighing just 28 grams, and they have hydrophilic nose pads and secure arms that stay put, even during intense sweat or movement.
How is the lens performance and protection?
The lenses offer 100 per cent UV protection, they're scratch-resistant and they deliver perfect clarity with little to no glare.
Are the Forty2s suitable for all face shapes and sizes?
Yes, the Forty2s come with interchangeable nose pads and a flexible frame, so they are adaptable to a wide range of face shapes and sizes.
Are the SunGod Forty2s sustainable or eco-friendly?
Yes. The SunGod Forty2s are made from recycled materials and they have replaceable parts, which helps to reduce waste and improve their longevity.
Are the SunGod Forty2s used by professional athletes?
When you put on a pair of SunGod Forty2s, you know you're putting on a pair of sunglasses that are loved by the pros. Mahamed Mahamed, the fastest British finisher at the 2025 London Marathon wore these sunglasses, as did elite runners Anya Culling and Phil Sesemann.
