It’s 45 degrees outside. A tank will no longer due, so you have to look for your best long sleeve running shirt—the first top to come out of the wash, the long sleeve base layer you wish you could wear day after day, week after week. But with a new year, comes new options for a great long sleeve running shirt. At Janji, we love testing products to find the best pieces in a category. Finding best long sleeve running top for women is no different: we tested dozens of basic, well designed, and cold weather long sleeve running shirts to find the best in the market. Below are our favorites.