Fortis

Fortis Eyewear – sunglasses for anglers who read water

Fortis Eyewear is a British brand focused on polarized fishing sunglasses, technical clothing and equipment built for long days on the water. Its philosophy is simple: see deeper, see further and stay comfortable in demanding conditions.

Fishing is not just about looking at the water. It is about reading currents, spotting shadows, fish movement, weed beds, rocks and changes in the riverbed. This is where Fortis excels – creating optics that reduce glare and help anglers see beneath the surface.

How do Fortis polarized sunglasses work?

The biggest challenge when looking at water is reflected light. As sunlight reflects off the surface, glare hides what is happening beneath and causes eye fatigue. Fortis polarized lenses use a special filter designed to reduce this type of reflection.

The result is a cleaner image, less eye strain and a better ability to detect fish, weed beds, rocks, structure and movement below the surface. For anglers, this means better decisions on the water and improved awareness of what is happening beneath the glare.

Choosing the right Fortis lens colour

Fortis does not believe in a single lens for every situation. Each lens colour is designed to perform best under specific lighting conditions.

• Amber – ideal for low light, early mornings, evenings, cloudy days and shaded banks.
• Brown – a versatile all-round lens with enhanced contrast for everyday conditions.
• Green – natural colour reproduction and long-term visual comfort.
• Grey – darker lens for bright sunlight and open water environments.
• Switch – photochromic technology that adapts automatically to changing light conditions.

Fortis lens technologies

Switch is a photochromic technology. The lens darkens in bright conditions and becomes lighter when light levels drop. It is ideal for anglers who spend the entire day outdoors or regularly move between shade and open water.

XBlok is a mirrored lens coating designed for challenging lighting conditions. It helps further reduce glare and optimises visual performance depending on the lens colour.

What is Triple X technology?

Triple X is Fortis' premium lens technology focused on optical clarity, lightweight performance and all-day comfort. The illustration above shows the multi-layer lens construction where several specialised layers work together to protect vision, reduce glare and maintain a clearer view of the water.

• Polarizing layers help reduce glare from the water surface.
• Protective layers improve durability for everyday use.
• Hydrophobic coating helps repel water and dirt.
• XBlok layer provides additional control over harsh reflections.
• Slim optical construction supports a clearer and more natural image.

For anglers, this translates into reduced glare, easier water reading and less eye fatigue during long days on rivers, lakes and reservoirs.

Who are Fortis sunglasses for?

Fortis makes the most sense for anglers who actively read water. Fly anglers benefit from improved visibility of currents, structure and fish movement, while stillwater anglers gain a clearer view of weed beds, drop-offs and underwater features that would otherwise be hidden by glare.

Who might they not be for?

If you are simply looking for inexpensive fashion sunglasses, Fortis may not be the right choice. Their value lies in fishing-specific optics, polarization and purpose-built lens designs tailored to real conditions on the water.

Fortis at Thymallus

At Thymallus, we selected Fortis because these sunglasses solve a real problem for anglers. They are not just another accessory – they help you read water more effectively, reduce eye fatigue and make better decisions while fishing.

Amber for low light, Brown as the all-rounder, Green for natural vision, Grey for bright sunshine and Switch for constantly changing conditions.