MOBILE WARMING Men's Balmore Heated Rain Jacket (Black, X-Large) Innovative technology provides a quick warm up or constant warmth for cold weather play Lightweight jacket eliminates the need for bulky layers Fabric is seam sealed, water resistant, windproof and breathable for added performance Provides up to 10 hours of comfortable warmth. Includes a 7.4 volt rechargeable lithium-ion battery, charger and instruction booklet