Smith Liberty MIPS Lightweight Women&';s Snowboarding Helmets. Designed for ultimate integration with Smith goggles for maximum comfort and venting. AirEvac ventilation system integrates with Smith goggles for fog-free lenses. Removable Snap fit SL2 ear pads add warmth and are audio-chip compatible. Aleck audio systems compatible. Hybrid shell construction blends a durable exterior with a lightweight in-moIded shell for durability where you need it most while keeping the helmet light, Zonal Koroyd coverage for lightweight, energy-absorbing and ventilated impact protection. Features: Fit: XT2 lining offers sweat-activated odor control. AirEvac ventilation system integrates with Smith goggles for fog-free lenses. Designed for ultimate integration with Smith goggles for maximum comfort and venting. Vapo-Fit Snow dial adjustment system offers 270-degree fit adjustment with the turn of a dial. Removable Snap fit SL2 ear pads add warmth and are audio-chip compatible. Aleck audio systems compatible.