The Mobile Warming Women’s Baselite Baselayer Heated Shirt from Fieldsheer delivers exceptional warmth and comfort for any outdoor activity. Designed as a versatile layering piece, it features a stretchable, pilling-resistant jersey knit fabric with a breathable mesh liner enhanced by Odorsheer technology for freshness. Multi-zone heating at the chest and back is controlled by a built-in touch button with four heat settings. A compact 7.4V Powersheer Mini battery provides up to 10+ hours of warmth and fits discreetly into a side pocket. With flat seam stitching, a thumb garage opening, and USB-C charging, this baselayer is perfect for staying warm in cool conditions. Machine washable.