Fieldsheer’s® women’s Proton Heated Baselayer Shirt is a versatile, all-season favorite, perfect for layering under a sweater, snow jacket, or other outdoor gear. Its sporty silhouette also allows it to be worn on its own. Powered by Powersheer™, the 7.4-Volt Lithium-Ion battery provides up to ten hours of power per charge, ensuring comfort in any weather. The shirt features a universal USB charging port for convenience. The subtle camouflage design adds sophistication to both the front and back, while a 3/4 zip keeps the shirt securely in place.

Integrated with our Mobile Warming® Technology, you can easily activate one of four heat settings using our proprietary Bluetooth® integrated MW Connect™ app. The Sweatsheer® liner effectively draws moisture away from the body, providing lasting comfort without compromising mobility. Made from a poly fabric blend, this baselayer shirt ensures flexibility, comfort, and performance, allowing you to stay active and enjoy what you love for longer.