Lazer Cage KinetiCore Bike Helmet - Matte Green. KinetiCore Controlled Crumple Zones absorb the force of direct impacts and rotation during a collision, redirecting energy away from your head to protect you when you need it most. More protection and more comfort. The Cage KinetiCore can be combined with a neck guard for enhanced safety. The magnetic buckle closes quickly and is easy to use even with full-finger gloves. It runs large.