When temperatures drop, working outdoors can become downright uncomfortable if you don’t have a way to stay warm. In some outdoor occupations, including construction, surveying, and landscaping, you need to move freely, so piling on restrictive clothing layers isn’t an option. That’s where heated vests come in. These typically lightweight garments, which fit easily over a shirt and under a jacket, feature battery-heated panels that help keep your core warm so you can continue to work.