BirdsEye Vision gives the 4D MAG ChromaPop Goggle one of the widest fields of view in Smith's lineup, and that much frame usually means fighting a helmet for a clean seal. The Mondo MIPS Helmet's Regulator Climate Control vents close that gap instead, keeping the rimless frame fog-free through the same 12 vents that regulate the helmet's own airflow. What Our Gearhead(R) Experts Are Saying:"The 4D MAG's field of view is enormous, and I expected some fogging at the edges where it meets the Mondo. It hasn't happened once, even lapping steep, sweaty bootpacks."