Lightweight & Versatile Layering Wear it as a baselayer, a superlight midlayer, or a jersey during active sports, the natural odour resistance of merino wool ensures you can wear it for several days between washes. So when you pack for your next active vacation, the Everyday Half Zip lets you get more use out of less clothing making for a lighter pack. Whats not to love? Why Icebreaker Merino? The merino is an ancient breed of alpine sheep. Over millions of years they evolved a superfine, highly breathable fleece to protect them from freezing winters & scorching summers. It will do the same for you. TEMP CONTROL Merino naturally keeps you warm in cold weather & cool in warm weather. BREATHABLE Merino absorbs & releases vapour to prevent overheating & clamminess. UV PROTECTION Merino gives you extra protection against the suns harmful rays, naturally. NO ODOUR Naturally anti-bacterial, it can be worn for days on end without washing.