Helly Hansen HH Dry Short Sleeve Running T-Shirt Lifa Fibre Technology - Wicks away moisture to help keep you dry and comfortable. HH Dry - A 3-Layer System that encourages moisture to travel through the layers, keeping the layer that touches your skin dry for maximum comfort. Seamless Technology - Seamess clothing increases garment comfort inside and out, leaving you with a more streamlined feel and improved fit.