A new, progressive design featuring HH Dry construction with Lifa technology, the extremely breathable and super-lightweight performance baselayer. Ideal for aerobic activities, providing ultimate comfort next to skin. High collar for extra protection and 1/2 zip for maximum venting and temperature control. Continually perfected over the last 40 years, Lifa Stay Dry technology is the unique ingredient of all Helly Hansen base layers. Material: Polypropylene.