As the warmest synthetic insulated Gore Tex jacket in Burton's line, the Burton Men's AK 2L Helitack Insulated Jacket keeps you blissfully warm through bone chilling blasts of Arctic air and summit winds. Its Gore Tex 2 layer membrane is guaranteed to keep you nice and dry, whether you're facing raging snowstorms or drizzly coastal conditions. PrimaLoft insulation traps fiery heat within its thermally efficient synthetic fibers. These synthetic fibers are not only extremely light and packable, but they're also resistant to moisture and condensation build up for high levels of warmth in wet conditions. Evenly distributing heat, the quilted down proof lining prevents the PrimaLoft insulation from migrating throughout the jacket. Fully sealed seams and YKK water resistant zippers prevent the intrusion of outside moisture from dampening your fun on the mountain. Other key features include a removable powder skirt, jacket to pant interface, as well as mesh bound internal pockets for extra storage.