Silky smooth, lightweight and with an impressive warmth-to-weight ratio, it's easy to see why Icebreaker chose merino wool as the main fabric for their base layers. Favoured by athletes and a popular garment in the range, the Women's Cami Ultra combines comfort and streamlined ergonomics to keep you at the top of your game. Packed with millions of tiny air pockets, the fabric is a supreme insulator, trappinng air and locking body heat within. And thanks to its moisture-wicking properties, it's a great temperature regulator too meaning you can be confident that your core will stay stable whether it's nippy or humid out. Natural anti-microbial properties keep you odour-free whilst its bio electrical harmony feature means it won't chafe, cling or cause static. Thanks to its streamlined fit and feel, it's ideal for layering too. You'll appreciate that over a bulky jacket up in the mountains.