Chromag Apparel Jacket Factor Packable BlackThe Factor jacket is an ultra lightweight jacket that stashes into its own pocket and easily fits into your bib short pockets. This windbreaker features DWR coating, spandex panels at the waist and cuff for extra form fitting, and laser cut venting. It has extra large vent panels across the back to let moisture out without letting in the rain. Not as bombproof as the Tachyon, but way more stashable and breathable.