"A great windbreaker for a lot of activities"  11/10/10

I got this jacket initially to wear on casual bike rides. I am amazed how often I've ended up using it. It's super lightweight, but does a fabulous job blocking the wind. There's enough ventilation built into the jacket that you don't overheat when wearing it. I'm 5'7" and a size 2 and I ordered a small. I probably should have ordered a Medium because the Small fits perfectly, but there isn't any extra room in the shoulders for me to add a layer underneath and I have tiny shoulders. The other thing is the jacket is a little short around the waist (it hits at the top of my hips) so perhaps a medium would have made the jacket a tiny bit longer.