Burton AK 2L Turbine Jacket: For the chronically cold or terminally fast. The AK Turbine Jacket features a 2 layer, Gore Tex performance shell to keep you dry. Riri AQUAzip™ water-resistant zippers eliminate the usual chicks in your wind and water armor, and a zip in jacket-to pants interface keeps the fluffy stuff from sneaking in the back door. The 2L Turbine Jacket also features Primaloft insulation to keep you warm, 100G in the body and 60G in the sleeves.