The Milwaukee Tool M12 Heated Axis Layering System with GridIron Work Shell is designed to keep the wearer warm from cold weather conditions. Powered by M12 Redlithium battery technology, the Axis jackets use carbon fiber heating elements to create and distribute heat to the chest, back, and shoulders. A one-touch LED controller heats up the jacket to three heat settings. The jackets are available in black with sizes ranging from small to 3XL. This kit comes with the M12 battery powered heated jacket and GridIron work shell, one M12 Redlithium CP2.0 battery, M12 compact charger, and power source.