
I am trying to run through the Boston winter: -6 degrees Celsius is the coldest so far. Was very comfortable with a long sleeve compression top underneath (nipples hurt a little without a tank/top). Medium works well for me (179cm 74kg). I warmed up a little when the temperature reached 8 degrees Celsius with a sweatshirt underneath. Unzipping the top would probably solve the overheating issue but found the phone and jacket to be moving with the iPhone in my pocket leaving me feeling a little unbalanced (such a diva!). The sleeves are long enough to tuck all your fingers in if needed. Almost 5 stars, but I'm one of those people who just don't give them up.

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