Designed for ice fishing, the Norfin Extreme 5 Heat Liner Jacket offers an incredible degree of warmth for the coldest days of the season. This lightweight jacket comes equipped with a built-in battery-operated Heat System that safely generates additional warmth inside the jacket to complement retained body heat and deliver maximum warmth; the front and rear heating elements ensure consistent, even coverage at all times. Great for cold-weather boating and snowmobiling too, the Heat Liner Jacket can be worn as standalone outerwear or as part of the Extreme 5 performance system (Bibs not included). Features a lightweight 100% nylon shell filled with heat-retaining 120-gram Hollofil Insulation; 2 side pockets with zippers; and an inner security pocket with zipper. Works with any 5V Power bank (not included) and connects via USB. Lightweight 100% nylon shell Warm 120-gram Hollofil Insulation Wear alone or as part of a performance cold-weather system 2 side pockets with zippers Inner security pocket with zipper