Yes. Older style polypropylene tops like helly Hansen may stink but newer materials/treatments are much better. I used a Haglofs Ridge Tee for 3 days in the heat of the summer with hardly any discernable whiff. It has a 'lava' treatment which I believe is simlar to polygene. I love merino for the warmth and comfort but the Haglofs top changed my mind about using it as a base layer when active so I am moving over to modern synthetic instead.