Louis Garneau - HG Astral Cycling Helmet In-Mold construction Evacuation channels: Moisture evacuation channels provide better airflow and moisture wicking. Spiderlock Solo III: Permanent helmet stabilizing system. Its inclination is fixed and it has a headband that completely surrounds the head. It can be easily tightened using only one hand thanks to its dented wheel. Steplock SL divider: Ultralight cam locking device to quickly adjust strap position. Sealed Airdry padding: Washable sealed adjustment padding for enhanced durability, and ergonomic design for optimum comfort.