Purchased the men’s heated softshell vest in medium (I’m 5’ 9” and 170 lbs) and it fits nicely, snug enough to layer under my larger shell but big enough for a sweater underneath. The vest heats quickly and the back zones kept me warm on the medium setting. I’ve used this under a rain shell for my son’s 2-hour baseball practices outside in the wet, cold and wind of the PNW without any issues. The battery charge lasted for 3 full practices on medium setting and could have done a little more but I recharged the battery because I didn’t want to be left in the wet coldness. Overall, this is my family’s 3rd Ororo purchase (wife and daughter both have the down vest) and the quality of the product, ease of use and long battery life are reasons I will not purchase cheaper imitations. I am absolutely satisfied with my purchase and will add more to my collection.