The evolution of icebreaker's original merino pullover top, the Merino 300 Original Long Sleeve Half Zip features breathable, naturally odour-resistant 100% merino wool that’s ideal for hiking, skiing, travel or everyday wear. The reliable zip-neck design easily regulates body temperature and forward-set shoulder seams help reduce friction when worn with a backpack. Inspired by nature, icebreaker harnesses the performance qualities of natural fibres to offer an alternative to clothing based on petrochemical synthetics. Merino wool is an annually renewable fibre that naturally resists odours, keeps you cool when it’s hot and warm when it’s not, and lets your skin breathe for comfort all day, every day.