The best heated jacket for extreme winter weather. The Summit Heated Down Jacket is engineered to provide heavy-duty warmth even in the most punishing conditions. A premium battery-operated down puffer jacket combining the natural warmth of 700-fill duck down insulation and an advanced 5-zone adjustable heating system for the ultimate in on-demand warmth. With Dual-zone controls, you command your microclimate-dialing up the intensity or extending battery life so your protection outlasts the storm.