By giving you more at the corners rather than more bridge-of-nose to top-of-frame distance, your field of vision unfurls like a beautiful ChromaPop enhanced banner. Additionally, Smith has integrated their mechanical locking mechanism into the frame outriggers, making lens changes super easy. The 4D MAG is the latest and greatest, especially for those who call the mountains their home away from home. QuickFit Strap Adjustment System with Clip Buckle Medium Fit 3-Layer DriWix Face Foam This product may contain chemicals known to the State of California to cause cancer, or birth defects, or other reproductive harm. AirEvac Integration Technology Smith's AirEvac ventilation Systems generate maximum airflow and ensure that warm air that causes fogging flows out of the goggles. The warm air can exit at the top of the goggles and make its way through the helmet's AirEvac system.