Durable and great to wear almost year-round. Coupled together with the removable 12V heated pant liner (included), it becomes a true 4 season riding apparel. The pant connects easily to the jacket liner heat supply or can be run directly to the controller. Heated socks or insoles can be easily added to the pant by utilizing the connections at the bottom of the pant cuff. Calf zippers with Velcro closure. YKK Zippers. AQUATEX breathable waterproof G-Liner membrane in the outer shell with a Durable Water Repellent (DWR) finish. Removable insulated liner with four Microwire heating zones: leg (2) and hip (2). Direct ventilation on the thighs. Superfabric panels on knees. Leather grip panels on the inside of the lower leg. Using Gerbing advanced interconnect system, Gerbing 12V garments plug right into your electrical system on your motorcycle, snowmobile, ATV, boat or airplane for an unlimited source of power and keeps you warm at any temperature, any speed.. All Gerbing installations require a Battery Harness and Temperature Controller for operation (sold separately).. About Gerbing Microwire: The patented Gerbing Microwire system is the most durable and efficient heating platform ever developed. Products incorporating Microwire technology utilizes patented micro-sized stainless steel fibers intertwined and encased in a proprietary waterproof coating. Gerbing Microwire technology will provide even heating for ultimate comfort. We recommend the use of a temperature controller with this product. Failure to do so may cause discomfort & burns.. We recommend the use of a temperature controller with this product. Failure to do so may cause discomfort & burns..