Great little jacket, I sized up, I'm an average size 10 (SB small for leggings) and went for medium to allow some base layers under when running. Originally posted on www.sweatybetty.com

The arms on this jacket are very slim so no warm air is able to get around your arms which remain cold. My arms are slim so it could be a tight fit. Originally posted on www.sweatybetty.com

Great jacket, the front is flattering sits tight but doesn't show lumps and bumps the arms are a great length (I am tall 5.11 and they fit me). It is a tiny bit short in the body but thankfully doesn't ride up when you run so this is fine. The top zipper can hit your neck when running but if you unzip it a tiny bit you can avoid this. Overall I love it and would purchase again. It gives you another layer without making you overheat. Originally posted on www.sweatybetty.com

Really like this running jacket. It is water resistant as it says. It isn't waterproof which it doesn't claim to be. However, I ran in an absolute storm yesterday and I was wet through to my underwear- but I wasn't cold and wasn't aware that I was wet. Nothing would have stopped me getting wet. But I wasn't sweating, I was just really comfortable. So a win for me. I have a few running jackets for bad weather. This is now my favourite. I sized up to a L. I am a 10/12 and a S in SB dresses and tops but M in the slim fitting ones. Originally posted on www.sweatybetty.com

Jacket was sleek allowing the body to move without restriction whilst running. It was warm and cosy with the neckline not being too high and tight. Great quality and good length too keeping lower back warm. Originally posted on www.sweatybetty.com