Smith Optics Maze MIPS Lightweight Snowboard Sport Helmet is a carefully engineered protective system that is integrated into the internal parts of the ski helmet and serves to protect the brain from sustained damage during the moment of impact. Those first seconds are where the vast majority of damage can occur. Integration: Designed for ultimate integration with Smith goggles for maximum comfort and venting. AirEvac ventilation system integrates with Smith goggles for fog-free lenses. Removable goggle strap lock for streamlined shell when goggles are worn under helmet. Aleck audio systems compatible. Features: Fit: Self-adjusting lifestyle fit system flexes to match your head shape for maximum comfort. Integration: Designed for ultimate integration with Smith goggles for maximum comfort and venting. AirEvac ventilation system integrates with Smith goggles for fog-free lenses. Removable goggle strap lock for streamlined shell when goggles are worn under helmet. Aleck audio systems compatible. Protection: Lightweight in-MoId construction fuses the exterior shell and EPS foam for a one-piece design that&';s lightweight and durable.