Oakley is expanding their Line Miner family with the addition of the Line Miner XM Prizm Goggle that is designed to fit more comfortably on medium sized faces. Equipped with all the same features of the original Line Miner, the XM promises to provide exceptional visibility on the slopes. Its cylindrical shape sits close to your face to enhance peripherals while the Prizm lens throws terrain features into sharp relief so you can clearly see the line you're about to take on. The dual vented lenses have an F3 anti-fog coating to keep your vision clear on wet, stormy days. If you wear prescription glasses, the XM accommodates them without compromising fit so you can see clearly as you lap your favorite runs. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.