![RC4 120 MV BOA 2025 26.5](https://cdn.powered-by-nitrosell.com/product_images/12/2873/thumb-fischer-rc4-120-boa-2024.jpg)
Redefining Peak Performance
The BOA® Fit System's H+i1 platform offers a proven advantage in both fit and performance, coupled with exceptional durability to endure the harshest Alpine conditions. Developed through more than 50,000 hours of collaborative design, development, and testing with renowned ski brands and athletes, it takes ski gear to new heights.
BOA® Fit System Components:
![boa ski boot dial](https://www.boafit.com/sites/boafit/files/2023-10/BOA-System-Components-Dial-600x400.jpg)
H+i1 DIAL PLATFORM
Maximum impact protection thanks to the bayonet and cartridge system. Micro-adjustable in both directions for precision tightening and loosening.
![boa ski boot wire](https://www.boafit.com/sites/boafit/files/2023-10/BOA-System-Components-Lace-600x400.jpg)
LACE
A core made from nineteen strands of stainless steel, wrapped in an additional 90 strands. Tensile strength >254 kg to hold up in the toughest conditions.
![boa ski boot lace guide](https://www.boafit.com/sites/boafit/files/2023-10/BOA-System-Components-LaceGuides-600x400.jpg)
LACE GUIDES
Low-friction guides settle the lace tension to create a uniform wrap and adapt to every individual foot shape.
![boa ski boot dial](https://www.boafit.com/sites/boafit/files/2023-10/Benefits-DialedIn-600x600.jpg)
DIALED IN
Micro-adjustable, precision fit.
![boa ski boot graphic](https://www.boafit.com/sites/boafit/files/2023-10/Benefits-LockedIn-600x600.png)
LOCKED IN
Uniform wrap delivering superior heel hold and edge-to-edge control.
![boa ski boot in action](https://www.boafit.com/sites/boafit/files/2023-10/Benefits-Confident-600x600.jpg)
CONFIDENT
Engineered to perform in the toughest conditions.