- The article is about battery heated base layers and heated shirts as a solution for staying warm during cold weather activities. - The company claims to have the world's largest selection of battery heated base layers. - The article highlights the warmth and comfort provided by these high-quality heated garments. - Heated base layers are recommended for those who want to stay warm while being active outdoors. - Currently, there are only a few recommended heated base layers available. - Most of the recommended base layers are base layer shirts, but there is one unisex base layer set that met the standards. - The biggest issue with heated base layers is battery life. - If the base layer is set to high, the battery life will last for about 2 hours. - The battery life extends to 6 hours if the base layer is set to low. - Only four heated base layers were found to be recommended for 2022.