The dewalt dcj069xl heated jacket is especially designed to provide hours of warmth to the core of your body utilising dewalt xr batteries not included the jacket itself is created from a durable outer shell that is resistant to water rain and wind 3 core zones are heated during wearing these include the upper left chest right chest and mid back evenly spreading the heat to the most important parts of your body there are 3 temperature settings to chose from low medium or high the