The original Halo Jacket was launched in 2008 as a super lightweight down jacket when the category didn't exist. Crux recognized a need for an insulating layer that was light enough to prevent overheating, but also warm enough to prevent overcooling when taking a breather. For Winter 20152016, the Halo Jacket is update by switching to a water resistant Pertex Endurance shell. The hood is now fixed, and the overall fit is slightly refined, leaving it slightly longer and slightly more snug. The down is still a market leading 970 fillpower sourced from Poland.