All-Around Warming for Cold Hands. 3 pieces of durable and safe carbon fiber heating element create the largest heating area to provide the maximum warmth covering the front and back side of your hands.

Features:

• All-Around Warming for Cold Hands: 3 pieces of durable and safe carbon fiber heating element create the largest heating area (twice larger than others in the market) to provide the maximum warmth covering the front and back side of your hands.
• 14 Hours of Adjustable Heat: The UL-certified safe rechargeable battery guarantees an industry-leading heating time of up to 14 hours. 3 heating settings (high, medium, low) for you to select the suitable heat output you need by simply pressing the power button on the front. Bonus: you can charge your smartphone at the same time with the USB port on the battery.
• Premium Insulation: This hand warmer features a flexible ribbed cuff that helps trap the heat perfectly and ultra-soft fleece-lined insulation that brings warmth and comfort to the next level.
• Functional Storage & Customized Fit: In addition to a battery pocket, two extra utility zipper pockets add quick convenient storage for your personal items and one S-Biner SlikeLock keeps your valuables extra secure. Achieve your size simply with the easy-to-adjust waist strap.
• Added Protecting from Elements: Wind and water-resistant shells provide protection from wind and rain when you are watching games at the stadium, taking a rest on a hunting tour, or commuting to work. Easy care, machine washable.