With full face mountain bike helmets becoming lighter and better ventilated, and convertible helmet offerings increasing, more and more riders seem to be upgrading the safety of their skid lid.
Virginia Tech studied 86 different bike helmets, almost half of which were mountain bike helmets. They found that MIPS is still the best at preventing concussions.
With a convertible mountain bike helmet like the Parachute MCR from MET, you can have all of the protection you want, with a lighter weight and cooler package for climbing.
Though Smith Optics' new Forefront 2 mountain bike helmet shares its name and aesthetics with the previous iteration of this lid, it is, in fact, a complete re-design from the ground up.