Black Nike Aeroloft Running Jacket This jacket is perfect for running in the winter weather. This is a size medium (8/10) and fits true to size with room for a light layer (or two) underneath. The material on the front, back, and outside sleeves are similar to a “puffer” jacket, while the underside of the sleeves are a bit stretchy without the puffer material. For reference, I am a regular medium size, with a 36B chest. No snags, rips, or tears. This jacket is in GREAT condition. Originally $250.00