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Layer up the right way this winter, thanks to the Helly Hansen Active Flow Long Sleeve Top. Unlike other more restrictive and tight fitting base layers, the Active Flow takes a different approach, providing you with a more relaxed and comfortable cut that is just as useful under a jacket or as a street piece. The Active Flow Long Sleeve Top does not neglect moisture management either, with top-of-the-line Lifa® Flow keeping you dry and comfortable during the most demanding of activities.