The Icebreaker Women's ZoneKnit™ Tank is Icebreaker's most breathable and lightweight vest top, specifically designed for high-exertion activities. The ZoneKnit™ features body-mapping technology that actively regulates your body temperature and lets skin breathe during high-intensity activity, alongside eyelet mesh inserts for optimum ventilation. The ZoneKnit™ also features Icebreaker’s moisture-wicking jersey Cool-Lite™ fabric with Merino wool, a naturally temperature-regulating and odour-resistant fibre. Finished with offset shoulder seams that reduce friction when carrying a pack. About Icebreaker Cool-Lite™ Silky-soft Merino and TENCEL®, sourced from sustainable eucalyptus plantations, combine to create Icebreaker Cool-Lite™, a luxurious fabric that naturally regulates your body’s microclimate. Inspired by nature, Icebreaker harnesses the performance qualities of natural fibres to offer an alternative to clothing based on petrochemical synthetics.