Level 1 ventilation is a lightweight and simple approach. The Lyric X2 keeps the cold air out with a quick manual adjustment to the interior liner. Shut it down if things are cold outside or open it up for a warm day of hiking in the backcountry. LYRIC X2 Safety Tech Maximum Protection Using ACT in-mold multi-shell construction and specific gravity EPS foam density we optimize each impact zone so you have the protection you need where you need it. MIPS When was the last time you landed exactly on the top or side of your head? MIPS is the industry standard for added protection during all the other impacts we see on the mountain. Pret Lyric X2 Team Helmet