The original Helly Hansen base layer trousers for men-- The Mens Helly Hansen HH Dry Fly Pant. 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 HHDry 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.