The Obermeyer Cosima Jacket is a kids' ski jacket with insulation mapped by body zone through Thermal Zone Distribution. The mapped Sorona Bi-Co insulation keeps the jacket comfortable for everyday wear, on the hill or off it. What Our Gearhead(R) Experts Are Saying:"Across a full day of lift rides and long runs, the stretch fabric flexed with every turn and arm swing. Stretch panels in the lining followed along, so my kid kept a full range of motion from the first run to the last."