Shop the Kjus women's high-performance Momentum down ski jacket. The puffy style features large, bonded chambers filled with premium down and intelligent KJUS FAST Thermo Core™ insulations that work together to offer ultimate warmth. The KJUS AC-Vent™ ventilation system thermoregulates body heat, and a highly technical Graphene lining expertly redistributes heat throughout the fabric to actively banish hot spots. We've even lined a special phone pocket with Graphene to keep your device from losing battery in cold conditions.