The Merino 150 Siren Bra is lightly supportiv, comfortable and soft next to your skin for easy everyday layering. The Siren's light 150gm Merino Corespun fabric helps regulates body temperature in all weather conditions. The modern styling also features thin, adjustable straps and no side seams. Space to insert bra cups allows for the perfect fit. 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.