The Crazy M Flame Jacket is the ideal hybrid jacket for high-intensity mountain activities, even in harsh conditions. Its hybrid construction combines insulated panels with fleece for chest and arm protection while maintaining excellent breathability on the back (usually under a pack) and underarm areas. The front and side sleeve panels are crafted from Airtastic, an ultra-lightweight nylon fabric with wind protection and water repellency. The insulation is made from lightweight, breathable Polartec Alpha. The back and inner sleeve panels feature an innovative fleece that wicks moisture away from the body and provides good water protection with its DWR finish. The bottom back panel is constructed from HP 3D fabric, known for its extraordinary breathability.