Gridarmor Merino Wool Tee Men Black Beauty Fjellsport.no Portal Drift Merino Tee Black Beauty Portal Outsiders Store UK PORTAL Drift Merino Wool Blend Jersey T Shirt for Men MR PORTER. An indispensable, discipline spanning t shirt, the Drift Merino Tee from Portal is deserving of the 'essential' descriptor. This is thanks to the majority merino wool composite fabric, a natural fibre that's long been touted for its exemplary moisture wicking, odour repelling and quick drying properties, performing better than most if not all synthetic fabrics. It also features gusseted underarms and raglan sleeves for a full range of movement, as well as flatlock stitching to reduce chafing.