Nike Men's Trail Polartec® 1/4-Zip Fleece Running Top Size:M Batteries 2 x 3V lithium

Batteries 2 x 3V lithium 2032

Its lightweight fleece is brushed on both sides and enhanced with heat-regulating tech for all-around fuzzy comfort

first-time 5K runners

We added a midfoot system—which the Mamba 5 didn't have—for foot security and durability

Nike Men's Trail Polartec® 1/4-Zip Fleece Running Top Size:M Batteries 2 x 3V lithiumNike Trail has the durability and adaptability to help make connecting with your surroundings easier, even in dynamic conditions. This Polartec pullover is made with supersoft fleece to help you stay warm on and off the trail. Nylon panels on the shoulders and arms repel water to help keep light rain at bay. Polartec is a supersoft and lightweight fleece that helps keep you warm while venting excess moisture. Woven nylon panels repel water and help