What Our Gearhead® Experts Are Saying: “The Siz Jacket delivers serious warmth without the bulk. The Polydown insulation feels like real down but dries faster, and the 20K waterproofing holds up in deep powder. I’ve worn it on storm days and bluebird laps alike—it’s that perfect all-around ski shell-insulator hybrid.” When the forecast calls for snow and adventure, the Rossignol Siz Jacket keeps us warm, dry, and ready to charge. Built for performance on and off the mountain, its 20K/15K waterproof breathable membrane repels storms while allowing moisture to escape during active days. Inside, recycled Polydown insulation mimics the loft and warmth of natural down for cozy comfort even in damp conditions. The fixed hood, powder skirt, and stretch cuffs with thumb loops lock out cold air, while multiple YKK-zippered pockets keep essentials secure. From first chair to last run, this jacket brings Rossignol’s alpine legacy to life in a modern, eco-conscious design.