Perfect for every season, the Proton Heated Baselayer Shirt features a subtle gray camouflage detail across the front and back, giving it a sporty vibe. At the same time, a 3/4 zipper allows you to easily layer up or down as the conditions change. Multi-zone heat elements across the back deliver even warmth, and in-seam thumbholes keep your hands warm without sacrificing mobility. A midweight baselayer, the Proton is perfect for days when you begin early in cold conditions, and our Sweatsheer® technology quickly wicks moisture away from the body, keeping you warm and dry for hours on end. The Proton Heated Baselayer Shirt allows you to keep going no matter what the conditions throw at you, and by maintaining a healthy temperature, you reduce fatigue, muscle soreness and decrease sensitivity. 

FEATURES:

• 60% Polyester, 30% Rayon, 10% Spandex
• Sweatsheer™ Moisture Wicking Mesh Liner
• Midweight Base Layer
• In-seam Thumb holes on cuffs
• Quarter-zip
• Multi-Zone Heat Elements: 2x Back
• Integrated Touch Control Button
• 4 Selectable Heat Settings
• 7.4volt Rechargeable Lithium-Ion Battery
• Up to 10 Hours of Power Per Charge
• Universal USB Charging Input