Windproof, waterproof polyester main body construction for maximum warmth Side panel features dual-layer construction; Lycra (inner) and breathable cotton/Lycra blend (outer) allows moisture to escape while retaining heat and a snug fit Entire liner is heated, including the back and collar Men's jackets feature an external zippered pocket on the front chest; women's jacket features two front side pockets and a female-specific tapered fit Connects to 12V power source; 20" battery cord included Men's and women's jackets provide 87W of heat and draw 6.4A Glove connector cables at the end of each sleeve Two input connection points are fixed on the inside left panel allowing jacket and optional gloves to be controlled separately On/off and temperature control for the jacket liner requires the purchase of either the coax switch cord (PART #2130-0073) or single output temperature controller (PART #2130-0070); for use with gloves, purchase either the dual coax switch cord (PART #2130-0080) or dual temperature controller (PART #2130-0071), sold separately GEN X-3 and GEN X-4 are fully compatible.. JKT LINER HEAT X4 BK MD