Discontinued . Crafted of their lightest, finest merino wool , Icebreaker's Siren Sweetheart base layer top defines superlative softness that can be enjoyed anywhere, at anytime of the year.

• Icebreaker harvests merino wool exclusively from sheep grown in the Southern Alps of New Zealand, where conditions are extreme and the wool responds accordingly
• Ultralight itch-free merino wool naturally wicks moisture, regulates temperature, resists odor and dries quickly
• Spandex added for a perfect fit
• UPF 30+ sun protection
• Sweetheart V-neck
• Long sleeves
• Tag-free neck
• Lightweight base layer
• Base layer weight: Lightweight
• Made in China
• US shipments only