One frame
Four lenses
One complete kit
Italian-made sunglasses with a hidden lens-swap system. Every kit includes all four lenses.
One frame
MADE IN ITALY
CARL ZEISS OPTICS
ONE FRAME, FOUR LENSES
FREE SHIPPING
The mechanism
Change the lens, change the light
The lens mask clicks in from the back. No tools, seconds to swap.
One frame
24.3 g, hand-polished TR90
Four lenses
All ZEISS — Sun, Focus, Relax, Refresh
ZEISS BioChrom
Three colour lenses, plus Sun
One case
Tool-free swap, travel-ready
Swap the state, not the sunglasses
Sun · neutral
True-to-colour, full sun protection. The neutral lens your kit starts with.
The science
Colour changes how you feel. ZEISS studied it
The Color Cult transforms colour science into wearable performance.
590 · 530 · 470nm
Not tinted glass — each lens is calibrated to one precise wavelength of light.
Lab-tested
Developed with research from the ZEISS Vision Science Lab, Tübingen, and BrainLab at IULM University, Milan.
Read the research →The shift is on
Precision-tinted lenses have moved from research labs to locker rooms — used for focus before performance and recovery after.
BIOCHROMby
The cult is open
You've seen the light. Now choose which one
One frame, four ZEISS lenses, one kit. Tortoise, Crystal or Black.
Discover the kit