Overall I like it. I ordered a large and it fits but is just a little tight. If you look at the picture, it suits me like that. There's not much room underneath, maybe just a lightweight polyester running shirt. Haven't worn it to run yet. It is designed for light drizzle or wind. This is a spring or early fall jacket. I like the reflective design. People should see you in this jacket. Hurry Spring! I decided not to exchange for XL because I thought it would be too big.