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From dirt trails and altitude training to paved roads and long flats, the BOA Fit System is engineered to help you perform at your peak with increased connectivity, precision, and control.

La Sportiva Cyklon


La Sportiva Cyklon trail running shoe with the BOA Fit System
BOA Fit System Li2 for trail running

Get closer
to go further.

The BOA Fit System gives you a better connection to your gear by using instant micro-adjustments to effortlessly dial in the perfect fit for improved stability and stride predictability.

Ready for anything.

Lightweight, waterproof, and ultra-durable, the BOA Fit System is engineered to perform in any condition.  

Saucony Switchback 2

Saucony Switchback 2 trail running shoe with the BOA Fit System

the boa advantage.

Each micro-adjustable system uses unique dial, lace and guide configurations to deliver unprecedented fit and performance. While each component is crucial in optimizing the fit experience, the foundation of the BOA Fit System is the BOA dial.

L6 is the most widely used dial in the L-SERIES thanks to its versatile cartridge system. Designed to keep you going, the two-part design provides maximum impact protection and effortless field repair – when extreme force ejects the dial, you can easily pop the cartridge back in and get back on the trail.

Engineered for quality and durability, L6 provides a micro-adjustable fit and allows for fast release.

How L6 Works


adidas agravic trail running shoe with the BOA Fit System

Making the best gear even better.

Together we're redefining the possibilities of fit.