The original Helly Hansen Dry Fly base layer trousers for men. This iconic design is ideal for active men enjoying sports and training in the great outdoors. From consumer input combined with professional research, these pants have been improved and redesigned numerous times over the last 4 decades. Great for aerobic activities providing ample insulation and excellent moisture management. The HH Dry construction with 100% Lifa is a quick dry, extremely breathable and super lightweight high performance base layer. Continually perfected over the last 40 years, Lifa Stay dry technology is the unique ingredient of all Helly Hansen base layers.