Designed with versatility, function, and value in mind, Fieldsheer’s® Proton women’s Heated Baselayer Shirts deliver uncompromising performance. A mid layer design can be thrown over a shirt on cool days, or easily slides under your favorite jacket for all day adjustable heat when you need it the most.

• Mid Layer Versatility: From everyday use to extreme cold weather activities, adjustable heat on the go or in the home.
• 1/4 Zip Design: Versatile pullover 1/4 zip design can easily be worn over a t-shirt or used under a jacket when the weather turns really cold.
• 4 Adjustable Heat Settings with up to 9 Hours of Heat: Easily adjust temperature directly on the shirt using the integrated touch control button, or from the convenience of your phone or smart watch. Up to 9 hours of heat between charges (Up to 2.5 hours on high, Up to 3.5 hours on Med/High, Up to 5 hours on Med/Low, Up to 9 hours on Low) temperatures range from 90-135 degrees.
• Bluetooth® Wireless Control via the MW Connect™ Mobile App: Control temperature, monitor battery levels and turn your vest ON & OFF from the conveniene of your phone or smart watch, Apple and Android compatible. This is especially important when using the vest as a baselayer, under a jacket or outer layer.
• Powerful Warmth Precisely Delivered: Mobile Warming® Heating Technology uses ultra-thin, flexible heat pads powered by our Powersheer® Mini, a 7.4V lightweight rechargeable battery. Strategically placed throughout the garment, these pads deliver consistent, adjustable warmth at the touch of a button—so you stay comfortable in any condition, without the bulk. 2 heat panels on the chest, 1 panel on the upper back.
• Mid Layer Versatility: From everyday use to extreme cold weather activities, adjustable heat on the go or in the home.
• 1/4 Zip Design: Versatile pullover 1/4 zip design can easily be worn over a t-shirt or used under a jacket when the weather turns really cold.
• 4 Adjustable Heat Settings with up to 9 Hours of Heat: Easily adjust temperature directly on the shirt using the integrated touch control button, or from the convenience of your phone or smart watch. Up to 9 hours of heat between charges (Up to 2.5 hours on high, Up to 3.5 hours on Med/High, Up to 5 hours on Med/Low, Up to 9 hours on Low) temperatures range from 90-135 degrees.
• Bluetooth® Wireless Control via the MW Connect™ Mobile App: Control temperature, monitor battery levels and turn your vest ON & OFF from the conveniene of your phone or smart watch, Apple and Android compatible. This is especially important when using the vest as a baselayer, under a jacket or outer layer.
• Powerful Warmth Precisely Delivered: Mobile Warming® Heating Technology uses ultra-thin, flexible heat pads powered by our Powersheer® Mini, a 7.4V lightweight rechargeable battery. Strategically placed throughout the garment, these pads deliver consistent, adjustable warmth at the touch of a button—so you stay comfortable in any condition, without the bulk. 2 heat panels on the chest, 1 panel on the upper back.