Powered by Hexon Heat Technology, the Milwaukee Heated Merino Wool Base layer Pants provide Next To Skin Heat with Fewer Layers. The Heated Base layer Pants deliver up to 8 hours of runtime across two heat zones-thighs and seat-with high, medium, and low settings. Kitted with the Heated Gear 2.5Ah Battery and App Control, it integrates seamlessly with the Heated Gear App, providing a comfortable experience thanks to its ergonomic design. The premium merino wool-polyester blend fabric offers superior stretch, moisture control, odor resistance, and temperature regulation. This base layer offers a balanced fit with a regular cut, neither too tight nor too loose.