Tour Master Synergy Pro-Plus 12V Heated Sock Liners Tour Master Synergy Pro-Plus 12V Heated Sock Liners will keep your little piggies warm on those colder days. Don't let the cold keep you indoors! Features Nylon/spandex stretch shell for easy slip-on fit Polyester/spandex blend inner lining Flexible carbon fiber heating elements 12v DC / 8.2w total draw (pair) / .6a total current (pair) Fixed power jacks for easy connection to pant Does not include battery harness and safety fuse Hand washable Note: Sock liners do not have power button, and have only one heat setting.