Built with EXO SHIELD 4-way stretch recycled polyester shell and sealed from the elements with a 20k/20k laminate

Outer sock: 80% Polyamide

divided outer and inner cup seamless to the skin

temperature regulation

-The C-pack 1300 batteries provide up to 13 hrs of heat

Petzl CORE Rechargeable Battery Mens Shorts Built with EXO SHIELD 4-wayDescription Easy universal charging via the USB port Charge indicator on the battery (red = charging; green = battery charged) Performs well at low temperatures Limited environmental impact: the entire lifespan of a CORE rechargeable battery is equivalent to that of 900 standard batteries Compatible with all TIKKID, TIKKINA, TIKKA, TIKKA CORE, ACTIK, ACTIK CORE, ARIA 1 RGB, ARIA 2 RGB, IKO CORE, and IKO headlamps (versions post 2017) Comes with