The Men's AK High-G Down Insulator Jacket is Burton's lightest, most packable insulator. Pack it for a backcountry tour on your splitboard, or stuff it in your shell's pocket just in case the chairlifts are chilly during resort day. This jacket is insulated with 800-fill down, one of the highest fill ratings available for the highest loft and the lightest weight. Its Pertex Ultra Lightweight shell is equally light, thin, and packable. In fact, the entire jacket packs inside its own pocket for compact storage.