Boa
The BOA Fit System has become an industry standard in recent years, offering quick and easy twist-to-tighten functionality. It features a knob (known as the Coilerâ„¢) located on the front or side of the boot, which adjusts the boot's tightness through cables or ropes routed within the shell. Simply twist to tighten the laces, and pull the coiler out to loosen them.