AliBought this jacket last year online and I will honestly say that I love it. In winter I usually wear a hoody underneath it to give me a snug warmth feel although it retains heat well. As weather gets warmer I just wear it on its own. On several occasions I have actually packed it into a large resealable freezer bag lol, and took it with me in my rucksack on my hikes. However when I first bought it in a medium it was far too big and it just swallowed me up so I opted for the smaller size S. I am a size M in regular fitting shirts, and usually buy size M jackets but this one was too big. My height is 5' 7" slim build. I hope that helps someone.