A versatile active top for year-round layering and everyday comfort, the 200 Oasis Long Sleeve Crewe is icebreaker’s best-selling base layer, made with 100% merino wool.The soft merino jersey fabric is breathable, stretchy, and odor-resistant, and flatlock seams provide chafe-free comfort.Inspired by nature, icebreaker harnesses the performance qualities of natural fibers to offer an alternative to clothing based on petrochemical synthetics.Merino is an annually renewable fiber that naturally resists odors, keeps you cool when it’s hot and warm when it’s not, and lets your skin breathe for comfort all day, every day.FEATURES:Soft merino fibers that regulates body temperature in all weather conditions and resists odors.Gusseted underarms for mobility and comfort.Offset shoulder seams to prevent friction.Flatlock seams to prevent friction.Drop tail hem for added coverage.Benefits:100% Pure Merino.Body temperature regulation.Breathable.Moisture wicking.Odor resistant.Warm when wet.Biodegradable fiber.Through merino wool Icebreaker is able to create a sustainable product.Wool is a natural, durable and biodegradable product.Icebreaker wool is obtained following ethical criteria and is part of the ZQ program that ensures that farmers take care of the sheep and the land they inhabit.