The North Face Kilowatt ThermoBall(TM) Vest

From morning runs to evening gym sesh's, The North Face Kilowatt ThermoBallTM Vest provides the insulation you need to keep your core warm and toasty. Using their signature ThermoBallTM technology plus fleece panels for ventilation, it gives you warmth where you need it most, without sacrificing breathability. Plus, it's got a media port so you never have to go without your favorite workout tunes.