A shirt to fall in love with: the Siren SS Sweetheart by Icebreaker from its premium underwear collection is super comfortable. You can wear it solo all year round or as a base layer in cooler temperatures. Thanks to the merino corespun jersey with a low elastane content, the t-shirt accentuates your figure perfectly. The flattering, heart-shaped neckline makes it classy enough to wear to a restaurant in the evening. An improved product from Icebreaker with exceptional properties that you will love.