The Ladies Dynamic Half Zip from Helly Hansen has a high neck for cold and windy days. Printed logo and seams in a smart contrast colors. No side seams for increased comfort and performance. LIFA Sport is our most popular high performance layer, used for all sports, year round. It is a high energy base layer, offering exceptional moisture control. High energy sports in warm to cool weather. Designed to be worn next to the skin as part of the layering system, but also works well as a single layer.