Helly hansen swift 3 ski jacket mens the helly hansen swift 3 ski jacket utilises the a stretch helly tech performance outer with h2flow mechanical venting system to turbocharge air flow leaving you cool and comfortable mens ski jacket helly tech 2 ply performance fabric waterproof windproof and breathable 2 way mechanical stretch fully seam sealed dwr treatment primaloft black insulation 80g in body 60g in sleeves h2flow mechanical venting system recco advance