Cycling sunglasses are an essential piece of gear for any rider, whether you’re a casual commuter or a competitive racer. They protect your eyes from UV rays, wind, dust, and debris while enhancing visibility in different lighting conditions. Among the many options available, the KOO Open Cube Sunglasses have gained attention for their innovative design and performance.
In this in-depth review, we’ll take a close look at the KOO Open Cube Sunglasses, examining their features, comfort, lens options, and overall value. By the end, you’ll know whether these shades are worth adding to your cycling kit.
KOO, a sub-brand of Oakley, is known for producing high-performance cycling eyewear with a focus on aerodynamics and comfort. The Open Cube model is designed to provide maximum airflow while maintaining a secure fit—ideal for long rides and intense efforts.
Ventilated frame design for enhanced airflow
Lightweight and flexible O Matter frame material
Prizm lens technology for superior clarity and contrast
Unobtainium earsocks and nosepads for a grippy, sweat-resistant fit
Interchangeable lenses for different light conditions
The Open Cube sunglasses feature a semi-rimless design, reducing weight while maintaining durability. The frame is made from O Matter, a lightweight and flexible material that resists impact and deformation. This makes them comfortable for long rides without causing pressure points.
One of the standout features is the open-air design, which promotes airflow around the lenses. This helps reduce fogging—a common issue for cyclists, especially in humid or high-intensity conditions. The vents are strategically placed to minimize wind noise while keeping your eyes cool.
KOO utilizes Oakley’s Prizm lens technology, which enhances color contrast and sharpens details. This is particularly useful for cyclists who need to spot road hazards, read terrain changes, and maintain visibility in varying light conditions.
The lenses are also impact-resistant and provide 100% UV protection, ensuring your eyes stay safe from harmful rays and debris.
The Unobtainium material on the nose pads and ear socks ensures a secure fit, even when sweating. This material becomes grippier when wet, preventing the sunglasses from slipping during intense rides.
The Open Cube design offers an unobstructed view, allowing for better peripheral vision—a crucial factor for cyclists navigating busy roads or technical trails.
These sunglasses are designed to sit comfortably under a cycling helmet without causing pressure points. The arms are thin enough to fit seamlessly with most helmet straps.
One of the biggest advantages of the KOO Open Cube is the interchangeable lens system, allowing riders to swap lenses based on lighting conditions.
Prizm Road – Optimized for bright sunlight, enhances road contrast
Prizm Trail – Ideal for variable light (forests, mixed terrain)
Prizm Low Light – Best for overcast or dusk/dawn conditions
Clear Lens – For night riding or extreme low-light conditions
Bright Sunlight: The Prizm Road lens reduces glare and enhances pavement definition, making it easier to spot potholes or cracks.
Low Light: The Prizm Low Light lens brightens shadows without over-saturating colors, improving visibility at dusk.
Variable Conditions: The Prizm Trail lens is versatile, adapting well to changing light, such as tree-covered paths.
✔ Excellent ventilation reduces fogging
✔ Secure, sweat-resistant fit thanks to Unobtainium
✔ Lightweight and comfortable for long rides
✔ Interchangeable lenses adapt to any condition
✔ Superior optical clarity with Prizm technology
❌ Higher price point compared to some competitors
❌ Some may prefer a fully rimmed frame for added durability
❌ Limited color options compared to other Oakley models
The KOO Open Cube Sunglasses are ideal for:
Road cyclists who need high-performance eyewear
Gravel & mountain bikers who encounter variable light
Commuters looking for all-day comfort and protection
Racers who want an aerodynamic, fog-free design
They may not be the best choice for those on a tight budget, but if you prioritize optical quality, ventilation, and fit, they’re a top-tier option.
The KOO Open Cube Sunglasses deliver on performance, comfort, and versatility. The ventilated design sets them apart from many competitors, making them an excellent choice for cyclists who struggle with fogging. The Prizm lenses provide exceptional clarity, and the secure fit ensures they stay in place no matter how hard you ride.
While they are priced at a premium, the quality justifies the cost for serious riders. If you’re looking for high-end cycling sunglasses that combine innovation, comfort, and performance, the KOO Open Cube is a strong contender.
✅ Buy if: You want premium optics, anti-fog ventilation, and a secure fit.
❌ Skip if: You’re on a budget or prefer a fully rimmed frame.
Cycling sunglasses are a critical investment for eye protection and performance. The KOO Open Cube stands out with its innovative airflow design, Prizm lenses, and secure fit, making them a top choice for cyclists who demand the best.
