The Helly Hansen Men’s Stoneham Ski Jacket Coats have 2-ply fabric construction along with 4-way full stretch fabric and they allow a great deal of mechanical venting of optimal comfort. Not only this but the Helly Hansen Men’s ski Jacket Coat also brings along with itself a life pocket with Primaloft Aerogel Insulation and a foldaway brim too., 2 ply fabric construction., 4 way full stretch fabric., H2Flow System mechanical venting for optimal comfort., Life pocket with Primaloft Aerogel Insulation., Foldaway Hi-Viz brim.