Designed for the real backcountry sender, the Julbo Aerospace is tailored to perform equally well on the climb up as on the descent back down. The google packs tons of features to keep fogging at bay when exertion is high. The lens tilt forward to open up extra ventilation on the climb, then snap shut to seal out flurries on your powder run. The addition of a double lens system, vent ports, and anti-fog coating double up the fog protection. Plus, the Aerospace features Julbo high-tech REACTIC photochromic lens, which naturally adjust the tint to varying lighting conditions for perfect all-day visibility. These googles deliver the clarity you need on complex backcountry terrain!