Vsn.Biking Kona Sys.Pro Sports Glasses

Regular price €256,00
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Comes with a case for interchangeable lenses. Simply have the clip-on lens adjusted to your prescription at a Siols optician of your choice!

SIOLS.System PRO Sports Glasses

High-end performance for triathlon, cycling & endurance sports.


Ultralight with a precise fit – even under helmets – and optimized ventilation for clear vision, especially during intense peak performance. Designed for speed, stamina and full focus on your goal. Get in the zone, feel the flow, push your limits.

  • Comfortable and slip-resistant – even during long training sessions

  • Panoramic shield – for clear vision in a crouched riding position

  • Wind tunnel tested: extensive wind protection with strong ventilation, no heat build-up

  • Modular & versatile – compatible with various interchangeable shields & frame colors

  • 100% UVA & UVB protection 400, distortion-free with prismatic correction

    Size & Fit

    Developed for every nose and head shape – lightweight, pressure-free fit, pain-free to wear, helmet-compatible, and unisex.

    Your own point of view!

    Kona stands for triathlon. For combining the best and most challenging of all worlds. These are the glasses for it. With or without individual prescription. The world is yours.

    Your own point of view!

    Kona stands for triathlon. For combining the best and most challenging of all worlds. These are the glasses for it. With or without individual prescription. The world is yours.

    OPT.Clip – the core element of the SIOLS System

    The optical prescription insert is custom-made for you by a certified SIOLS optical specialist and simply clicks in between the frame and the shield.

    • It’s suitable for very high prescriptions and even progressive lenses.
    • Inserted from the front – the view is just like your regular glasses.
    • If your prescription changes, only the lenses are replaced – your sports glasses stay the same.

    OPT.Clip – the core element of the SIOLS System

    The optical prescription insert is custom-made for you by a certified SIOLS optical specialist and simply clicks in between the frame and the shield.

    • It’s suitable for very high prescriptions and even progressive lenses.
    • Inserted from the front – the view is just like your regular glasses.
    • If your prescription changes, only the lenses are replaced – your sports glasses stay the same.

    SIOLS Tech.Innovations

    The frame ergonomically conforms to the athlete's head. Even during long training sessions, the goggles sit securely without pressure points – and are therefore pain-free. The ErgoFit system ensures a perfect fit, even under a helmet. The nose pad is adjustable in six sizes, allowing the goggles to be adapted to different nose shapes and head sizes.

    From strong ventilation (10-point ventilation) for very intensive sporting activities to protection against drafts and turbulence (6-point ventilation) for fast-paced sports to temperature compensation of up to 60° in cold conditions – each lens is technologically perfectly adapted to its area of application.

    The design of each individual lens is the result of years of development work and thousands of kilometers of testing. Together with aerodynamic engineers, we developed our innovative ventilation technology in the wind tunnel. The result is a proprietary technology that we successfully use in all our sports eyewear: Retina Shield. It is the sum of all the quality features of the SIOLS system lenses, which uncompromisingly guarantee perfect vision and the best protection. Our efficient sports eyewear lenses are characterized by their aerodynamic properties, ventilation, and tints.