The Gerbing 7V Battery Women's Heated Pants feature a women-specific design that is ideal for adventurous and active women. Manufactured from a blend of polyester and spandex materials, these versatile pants offer extreme comfort and mobility for charged activities, including walking, climbing, running, and more. In addition, the pants have an integrated 2600 mAh battery for insulating the pants for up to 8 hours with low-heating mode and up to 2 hours with high heating mode. There are three heating modes for the desired insulation. The attached microwire heating panels are extremely lightweight and maintain insulation for a very long time even when the battery is completely discharged. Plus, the pants are machine washable, allowing you to wash and maintain pants.