Gerbing's Heated Glove Liner Form fitting and sizing allow for a snug fit as these gloves are designed to be worn under existing gloves or mitts. Equipped with Microwire Heat Technology to heat each finger and thumb as well as the back of your hand. Recommended for use with uninsulated riding gloves.The Glove Liner includes a streamlined design utilizing a Amara fabric on the palm for a better grip. Other features include a Nylon fabric on top of the hand that insulates the heating wires protecting them from abrasion, and an adjustable closure that secures the cuff at the wrist. FEATURES Gerbing's heated glove liners are constructed with Stretch Cordura allowing a form fit The glove heats the entire length of each finger including the thumb as well as the back of your hand Amara palm provides gripping power to the interior of your outer glove Adjustable Neoprene wrist fastener Brushed Tricot lining for added warmth and durability Patented Microwire heating technology Lifetime Warranty on the gloves' Microwire heating technology Includes Battery Harness and Glove Harness SPECIFICATIONS Heat Microwire Source 12-volts DC Current 2.2 amps Watts 27 watts Surface Temp 135F +/- 5F at 32F Gerbing's and RevZilla STRONGLY recommend the use of a temperature controller with this product, failure to do so may cause burns.