Ideal mid-layer or outerwear piece. Four-way stretch softshell fabric and patented Microwire™ heating technology warms up in seconds with a touch of a button and provides up to 8 hours of continuous heat to keep you warm during any cold-weather activity. Breathable and durable vest with a water-repellent finish to enhance the performance in wet conditions. Softshell bonded to a fleece lining provides added comfort, warmth and excellent next-to-skin feel. Four Microwire™ heating zones: Chest (2), Back (1), Neck (1). DWR finish repels snow and rain. Battery Integrated Temperature Controller. Gerbing 7V Battery Heated Jackets & Vests Include:. 7V 3400 mAH Rechargeable Lithium-ion Battery Pack (25.16Wh). Wall Charger. Detailed Instructions. Gerbing Lifetime Warranty.