MIPS Brain Protection System. Boa closure system lets you easily secure and adjust helmet fit with one hand. The in-mould composite skeleton increases helmet integrity and provides larger vent variations. The helmet pads are soft, comfortable, moisture-wicking, and washable. Internal, recessed channels move airflow over your head to keep you cool and dry. The removable snap-on visor and port covers provide flexibility to match your style. Easily-adjustable LockDown dividers provide clean helmet strap management. Crash Replacement Guarantee provides free helmet replacement if involved in a crash within the first year of ownership.