THE CALDERA ELECTRIC SNOW MODULAR SNOWMOBILE HELMET From the aggressive aerodynamic build to the innovative breath box, the Caldera Electric Snow modular is a value-packed, technology-loaded snowmobile helmet that is adaptable enough to excel through every adventure and in any weather. CALDERA MODULAR SNOWMOBILE HELMET FEATURES: andbull; Modular helmet design with secure metal jaw-locking system and easy one-handed front jaw opening switch. andbull; Breath box attachment reduces fogging by deflecting your breath away from the face shield. andbull; Heated snow shield with extra long fuse protected split cord that works with all snowmobiles, atvs or motorcycles to prevent ice buildup and eliminate fogging andbull; Massively expanded field of vision (30% more larger!). andbull; Drop down smoke sunshield with side-helmet action switch. andbull; High density channelled air flow EPS liner is pre-drilled to accommodate nearly all communication systems. andbull; 3 closable intake vents with an angled passive anterior exhaust vent to allow maximum air flow out without allowing wet weather in. andbull; Washable, replaceable Comfort Tech Wick-Dri Liner System keeps you dry and comfortable. andbull; Padded quick-release strap system. andbull; Lightweight 3.5 pound aerodynamic shell. andbull; DOT and ECE approved helmet offers world class protection. andbull; Every batch of helmets are randomly tested to ensure safety standards are met. andbull; 5 year limited warranty and guaranteed to be free from defects in materials and craftsmanship for the lifetime of the helmet. See Vega website for full warranty details Sizing: Measure around your head 1" above your eyebrows and the largest part of the back of your head:.