Uses a lightweight and wind-blocking fabric for maximum comfort and a form-fitted feel. Thermal insulation. Wear it over a thermal and under your riding gear for maximum warmth. Elastic/hook-and-loop strap retention. Designed to fit comfortably under regular riding pants. Heated zones cover the full front, side of the leg, and lower stomach. Built-in coax connectors at bottom of legs for easy connection of Gen X-4 Heated Socks (Heated Socks not included). Provides 46W of heat and draw 3.4A. Plugs directly into GEN X-3 heated jacket liner or vest; for independent use with temperature control, purchase coax plug battery cord (PART #2130-0072) and single output temperature controller (PART #2130-0070), sold separately. Integrated sock warmer plug come stowed in its own zippered pockets when not in use. Works with a 12V battery providing 46 Watts of heat and draw 3.4 amps of current. Size is measurement in inches from inseam to anklebone; should be slightly shorter than pants size.. Always wear the leg chaps over a thermal garment or pants; use of temperature controller is highly recommended.