The Lenz Women's 6.0 Fingercap Heated Mittens with rcB 1200 Batteries provide up to 11 hours of heat while warming the fingers from both above and below. High leather content upper with an extra fluffy inner lining. Flexible 4-way stretch fabric provides waterproofness and breathability. The included lithium battery packs snap into the gloves via press studs and can be controlled manually on the pack or via the free smartphone app. Winter chill will never get the best of you again with these heated mittens.