Heated Proton Base Layer Top – Women

The Fieldsheer Heated Proton Base Layer Top is a technical heated midweight layer designed to provide consistent warmth and comfort in cold environments. Suitable for year-round use, it combines breathable performance with integrated heating technology to support long days in low temperatures.

Multi-zone heating elements across the back deliver even warmth, while the ¾-length front zip allows for easy layering and adjustable ventilation. Sweatsheer® moisture-wicking technology helps regulate moisture to keep you dry during activity, and integrated thumbholes provide additional coverage without restricting movement.

Designed to help maintain a consistent body temperature, it supports comfort during cold starts, extended outdoor activity, and prolonged exposure to harsh conditions.

FEATURES:

• Midweight heated base layer for cold-weather performance
  
• 60% polyester, 30% rayon, 10% spandex construction
  
• Sweatsheer™ moisture-wicking mesh liner
  
• Multi-zone heating with two back heat elements
  
• Four selectable heat settings
  
• Integrated touch control button
  
• 7.4V rechargeable lithium-ion battery
  
• Up to 10 hours of heat per charge
  
• Quarter-zip design for easy layering and ventilation
  
• In-seam thumbholes for added coverage and warmth
  
• Universal USB charging input