Stay dry with the helly hansen active base layer staying dry is important in order to stay comfortable featuring lifa174flow and lifa174 stay dry technologies designed to effectively expel the build up of moisture the hh active base layer is a staple piece for any aerobic sport cut to a relaxed fit it doubles as a casual top and looks great both during training and pre and post sessions hh174dry construction the hh174dry construction with 100 lifa174 is a quick dry extreme