Techiche International ThermaFur Softshell Ultra Air Activated Heating Vest with 8 Heat Pax Body Warmers - Black - 5529S Soft, durable, wind/water repellant 100% Polyester, black soft-shell High collar w/zipper closure and two zippered pockets. 8 inside pockets that hold Heat Pax Body Warmers Include eight (8) HEAT PAX Body Warmers for 24+ hours of warming relief for your body Heating can be suspended at any time by resealing the Heat Pax in an airtight container