La Sportiva SOLAR Owner's Manual page 7

5. Spider Buckle EVO™
This dual lever closure system allows the transition from
walk mode to ski in a single rapid movement without
altering the preset position. The closure system allows for
the perfect distribution of tension.
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To customize tension on the lower part of the boot, insert the cable into one of
the holes at the tip of the tongue and select the desired position on the rear hook.
It is also possible to adjust the front hinge/hook for even greater comfort.
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