Designed with versatility, function, and value in mind, Fieldsheer’s® Thermick Men’s heated baselayer delivers uncompromising performance combined with our Mobile Heating Technology®. Thin enough to be worn under an outer layer, snow jacket, or rain gear but thick enough to be worn on its own, the Thermick heated baselayer is an essential piece of any outdoor person’s kit. Our Powersheer™ 7.4V lithium-ion battery is supported by a universal USB charging port and can provide heat for up to 10 Hrs on a single charge. 4 Distinct heat settings put you in control, and you can stay warm in even the harshest winter conditions. The Thermick Heated Baselayer Shirt keeps you in the field and doing what you love longer. The thermal cotton-poly blend offers numerous benefits, ensuring you’ll stay warm and dry all day long. Additionally, it’s an ideal fabric for layering as part of your outdoor equipment. Rib-knit cuffs make sure you stay warm without restricting mobility. Perfect as your first layer for the coldest winter days in backcountry powder, but thick enough to be worn on its own during a late fall camping trip or early spring morning jog. Multi-zone heating elements across your core deliver even warmth. The rib-knit cuffs keep it securely in place no matter what you’re doing from skiing, snowboarding, or any of your favorite winter activities. The Sweatsheer™ mesh liner wicks moisture away, keeping you dry, warm, and comfortable for Hrs on end, while the thermal midweight base layer delivers another level of protection. Battery features Powersheer™ standard rechargeable lithium-ion battery (7.4V 2200mAh), up to 10 Hrs of power per charge, UL/CE certified, USB cable included, charge time 3-4 Hrs.