A good pair of snow goggles stay securely in place, sit comfortably on our face, and don't fog up, and that is why we like the Anon M4S Cylindrical MFI Goggles. Featuring a cylindrical injected lens design with PERCEIVE optics, peripheral distortion is reduced while providing you with terrain clarity in almost any condition. Magnetic connections are used with MAGNA-TECH and MFI technologies to provide not just a quick lens change, but a lens-to-frame and mask-to-goggle seal to keep your face protected from snow and wind. While the goggles sit snug to the face with a triple-layer foam design, a full-perimeter vent channel ensures consistent airflow to keep you from fogging up mid-run.