Setting the standard for all others to follow, the 200 Oasis Short Sleeve Crew is icebreaker's best-selling base layer—a versatile active top for year-round layering and everyday comfort. The soft, 100% merino jersey fabric is breathable, stretchy, and naturally odour resistant, and flatlock seams help reduce friction. Inspired by nature, icebreaker harnesses the performance qualities of natural fibres to offer an alternative to clothing based on petrochemical synthetics. Merino 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.