evo.com | Smith Goggles > Buckle up, the vision-mad engineers at Smith increased overall field of view by 25% over the I/O MAG with the Smith 4D MAG Goggles. By giving you more at the corners rather than more bridge-of-nose to top-of-frame distance, your field of vision becomes unmatched. Additionally, Smith has integrated the 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. AirEvac(TM) 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. Medium Fit 3-Layer DriWix Face Foam Bird'sEye Vision(TM) State of the art lens technology with 25% increase in overall field of view copared to the I/O MAG. QuickFit Strap Adjustment System with Clip Buckle | Smith 4D MAG Goggles 2022 in Gray