""I’m game,” she said. “I’m in.” She pushed her sunglasses up onto the top of her head. The super-bendy photochromic lenses were constructed out of something called NXT, which had been invented by the army. Designed for battle, this pair was also great for trail running, deflecting slingshotting branches from scratching her eyes out, and mitigating the rapid-fire one-two shock of shadow and blazing sunshine during high-intensity sprints in the woods."