These are the car seat covers that have carbon fiber heating elements stitched into the fabric that release far infrared rays, providing both driver and passenger even, soothing warmth for the thighs and back without cold spots. Made of microfiber that can be spot-cleaned, the covers envelop an entire car seat and are secured with elastic bands and plastic hooks. Both covers are connected by one cord, so you only need to plug the the 12-volt adapter into your cars cigarette lighter. A controller allows you to individualize each seat with custom heat settings at the touch of a button, including pre-heat, low, high, and standby. The covers shut off automatically in 15 minutes. Set of two.