The Mobile Warming UTW Pro Heated Vest is a classic full-zip vest, featuring a durable Carbolex twill outershell and 150g 3M Thinsulate interior, along with our proprietary 7.4-volt Mobile Warming multi-zone heat system equipped with Bluetooth technology, enabling temperature adjustment via the MW Connect App. Stretch sides ensure added comfort, while heavy-duty YKK zippers are included in every vest. Whether worn over a shirt or under a jacket, this vest provides protection, comfort, and warmth. Key features include a 4-way stretch soft shell construction, 450D Carbolex polyester twill outershell, DWR water-repellent finish, quilted interior liner with 150g or 3M Thinsulate insulation, stretch sides, ZapSheer anti-static liner, YKK heavy-duty front zipper, zippered hand pockets, interior medical information tag, multi-zone heating system with 2x chest and back zones, 7.4-volt Powersheer Mini rechargeable lithium-ion battery, 4 adjustable heat settings, integrated waterproof touch control button, Bluetooth-enabled wireless control, MW Connect mobile app compatibility, machine washability, and availability in sizes SM to 4XL. The vest includes a Powersheer Mini rechargeable lithium-ion battery (7.4V 2250mAh), USB-C charging cable, and offers up to 9 hours of power per charge. Replacement batteries are available in standard, mini, and XL plus sizes.