"Full Description:\nYou love a good storm day as much as carving under blue skies. The Smith Altus ski and snowboard helmet lets you adjust the venting on the fly to match the weather conditions and your output. Of course, it brings safety innovations including zonal Koroyd® and MIPS® for the confidence to get after it in any snow conditions, too. It's light enough for backcountry missions and cuts a classic profile.<br><br><strong>Size:</strong>\n\n<ul>\n\t<li>Small - 51-55cm</li>\n\t<li>Medium - 55-59cm</li>\n\t<li>Large - 59-63cm</li>\n\t<li>XLarge - 63-67cm</li>\n</ul>\n\nFeatures:\n\u003cul>\n\u003cli>Lightweight in-mold construction fuses the exterior shell and EPS foam for a one-piece design that's lightweight and durable\u003c/li>\n\u003cli>Zonal Koroyd Coverage - KOROYD® is placed strategically throughout for lightweight, ventilated impact protection.\u003c/li>\n\u003cli>Mips - Brain Protection System reduces rotational forces caused by angled impacts to the head.\u003c/li>\n\u003cli>VaporFit Snow dial adjustment system offers 270-degree fit adjustment with the turn of a dial\u003c/li>\n\u003cli>Mips® Brain Protection System reduces rotational forces caused by angled impacts to the head\u003c/li>\n\u003cli>Zonal Koroyd® coverage for lightweight, energy-absorbing and ventilated impact protection\u003c/li>\n\u003cli>Designed for ultimate integration with Smith goggles for maximum comfort and venting\u003c/li>\n\u003cli>AirEvac - Ventilation system integrates with Smith goggles for fog-free lenses.\u003c/li>\n\u003cli>AirEvac ventilation system integrates with Smith goggles for fog-free lenses\u003c/li>\n\u003cli>Regulator climate control allows easy, one-handed vent adjustment\u003c/li>\n\u003cli>Ionic+® antimicrobial lining offers sweat-activated odor control\u003c/li>\n\u003cli>Select colorways offered without Mips® system\u003c/li>\n\u003cli>Removable, audio-compatible ear pads\u003c/li>\n\u003c/ul>\n\nSpecifications:\n\u003cul>\n\u003cli>Weight (Size M, Mips® and non-Mips®): 16 oz / 450 g\u003c/li>\n\u003cli>Certification: ASTM F 2040, CE EN 1077:2007 CLASS B\u003c/li>\n\u003cli>Style - E005082SW5155\u003c/li>\n\u003cli>10 vents\u003c/li>\n\u003c/ul>\n"