I bought this jacket in size medium in the azure color which is sadly no longer available. I usually wear a small but sized up to medium to fit layers underneath for my winter runs. I love the material - it is water resistant, wind resistant, and stretches to fit your body and accommodate your movements. I wouldn't call it a warm jacket at all as it is super light weight, but it makes an excellent outer layer. I wore it running 5 miles today in 23 degrees F with a thin base layer and thick fleece and I was perfectly warm. I'm so happy I'm able to leave my bulky down vest at home. The pocket on the chest is perfect for my phone. The wrist hole is small which was great in the fall when I didn't want wind to get in, but with layers underneath can get a little tight. I docked the "value" by two stars because I would not pay full price for this jacket, but the wonderful thing about EB is their amazing sales. If you can catch this for a song, you should!