Powered by M12 REDLITHIUM battery technology, Milwaukee M12 heated AXIS vests use carbon fiber heating elements to create and distribute heat to the chest and back. A one-touch LED controller allows users to select from three heat settings, delivering ideal heat for any environment. The new quick-heat function allows users to feel heat 3X faster than previous vests and market competitors. Hybrid construction featuring the new AXIS Ripstop polyester provides a lightweight, compressible design that can be used as an outer shell or a mid-layer, and provides wind and water resistance to survive the elements.