Louis Garneau - HG Carve 2 Cycling Helmet In-Mold Construction Super MSB technology a ring-shaped plastic protection at the base of the helmet reinforces the perimeter for enhanced protection The plastic shell is made with U-shaped ribs. These ribs act like a complex exoskeleton that reinforces the helmet structure Inner frame which distributes the shock of impacts, thus providing support and protection while being lightweight Moisture channels provide better airflow and moisture wicking Spiderlock Pro II can be easily tightened on the head using only one hand