The Giro Xar is one of the lightest and most ventilated helmet in our test, which makes it our top recommendation for cross-country riding and racing. The Xar is an updated version of Giro's iconic Xen, which was one of the first mountain bike helmets to offer more coverage in a half shell design. The Xar uses Giro's lightweight and highly refined Roc Loc 5 retention system to give this quality helmet a secure fit.
The Xar is available in three sizes, and along with our Best Buy Award winner, the Giro Feature, uses Giro's SuperFit sizing system. We found that all of the Giro helmets which use this system fit very similarly. If you own another Giro helmet, including most of their road helmets, it's very likely you will wear the same size in the Xar or Feature.
Retailing for $130, the Xar is one of the more expensive helmets in our test. We think that it is a quality helmet and is worth the money for riders looking cut every gram but who still value safety. If you value saving money over weight, check out either our Best Buy Award winner, the Giro Feature, or the Bell Stoker, both of which weigh just slightly more than the Xar while retailing for considerably less. If you are less concerned about weight and more focused on helmet coverage, check out either the Bell Super or our Editors' Choice, the Troy Lee A1, which both provide considerably more rear and side coverage than the Xar.