Heated Base-layer Pants

Control: built in 900C temperture controller with 3 heat settings
Heating element (3) knees & back
Shell Material: 94% nylon+ 6% spandex
 
Choose to be powered by:
(1) 7V battery system- 604 battery (7.4V 2200mah) 7 battery charger included or
(2) 5Volt USB battery - 5000mah or 10400mah) battery with min 2AMP output port.