Sure, it might be a little chilly outside, but the Mountain Hardwear Beta Power 1/4-Zip Long-Sleeve Shirt provides all the warmth you need in order to keep your training runs going in early spring or late fall. This midweight layer's semi-fitted cut allows for easy layering on top when clouds roll in, and the 1/4-zip front opening is perfect for venting away excess heat when you're pounding pavement, skiing, or ticking off mileage on the trail. Flatlock seam construction eliminates bulges that can cause chafing and hot spots at seams. Reflective trim keeps you visible in the headlights of cars at night.