La Sportiva SOLAR Owner's Manual page 8

7. Easy 2 Wear system™
The upper closure system that facilitates all the operations of fit thanks to the single lever
closure and the quick hooking/unhooking system completed by the micro-metric Velcro
band for micro adjustments. The adjustment is done by regulating the hook on the tape and
secured by Velcro. It is sufficient to make this adjustment only once: the metal ring situated
at the end of the strap, hooks directly onto the support on the cuff. To remove the boot,
simply unclip the metal ring without having to adjust band regulation.
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6. Swing-Lock Closure system™
Rear Ski/Walk hinge mechanism: ensures fast closure of the boot and avoids the
exposure of the mechanical parts to any kind of external impact and atmospheric
agents.
The closure uses the lateral rotation lever: from top to bottom to lock the cuff, and from
bottom to top to release.