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This is a great jacket for sept till december where temperature drops upto 3 degrees. Below that, not yet tested. May be a fleece jacket could help for heavy winters. Its comfortable to wear, light weight as well. Very happy with the purchase. Only thing to note is regardng the size. Its way bigger. I usally buys T-shirts in M or S. This jacket in S is way bigger than my expectation. So buy a size smaller than your regular size.