The jacket is very appropriately sized so that you could wear other layers underneath if needed. The thinnest of the jacket might give you the impression that it couldn’t possibly keep you warm.The real world test for me will be my upcoming trip to NYC on 12/7.I’m overall very happy with the look and super softness of the jacket and expect it to keep me warm, while at the same place being very stylish and on trend.Well made. Smart design. Great clue for the price.Very light, thin and surprisingly warm jacket that compresses into its own pocket for packing, so it's easy to have an extra warm layer always handy. No pockets on the inside of the jacket, which makes stowing wallet or [large] mobile phone difficult. Outside chest pocket is handy and the jacket provides surprising warmth for its very thin and light construction.Surprisingly warm for its light weight.Heed the warnings that this jacket runs large. I usually wear a large but ordered a medium and still found it roomy.After 4 coats it was the one that fit!Good thing that it is a little on the cheaper price tag. This product tears and rips very easy. Within 2 weeks of wearing had little snags and rips all over.great jacket!Well done.Well insulated, has two zips, protects well against wind and light rain (have not tried it in heavy rain as I have another coat for it). Would be nice if jacket had internal pocket and hood.Small size was a bit large for me.This is a great jacket for the money. It is quite thin, maybe wear on 8+C temp. The pockets are convenient and the double zip is a nice extra. Be warned though, the sizes are quite big. I usually wear M, but the S size is more than large enough for me.