Volt heated vest liner has been named the torso due to its slim fit and lightweight feel.  The way we keep it thin is by eliminating all insulation and combining a thin rip stop nylon layer with our Zero Layer Heat System.  With its extremely low profile design, it will feel like a part of your body when layered under an insulated outer shell.  Using our four panel 7v™ Zero Layer Heat System, you will get hours of deep penetrating heat, allowing you to stay comfortable in the worst of conditions.  Rechargeable battery heated vests can sometimes be a little too bulky to layer comfortably.  With the Torso’s slim design you can use it for almost any activity.  This battery heated vest can slide under almost any garment which makes its uses almost unlimited.  The Torso is a simple garment that functions like a piece of equipment, allowing you to get the job done. The Volt heated vest liner will come complete with a rechargeable battery and a wall charger. The charger is compatible with 110V or 220V outlets and has a standard U.S. plug.  All Volt products come with a 30 money back guarantee if the products are still in new/unused condition with all of the original packaging.  Our goal with this guarantee is to allow you to check the fit once you receive your Volt Heat product.  4 panel heating system(two panels in back and upper back, two panels on each side of the chest) Includes a powerful 7.4v lithium battery(VB725U) and charger Built-in 4 level microprocessor controller to select desired heat output Provides over 150 degrees of soothing heat on high for 2 hours and up to 10 hours on the lowest setting Zero Layer® heat system eliminates bulk while providing more efficient heat transfer. TORSO 7v Heated Vest Liner