This super lightweight Siren Long Sleeve Sweetheart Baselayer by Icebreaker utilises merino wool to help you stay cool in warmer weather and warm in cooler weather. It has a slim fit and the merino fabric removes the excess moisture from your skin, keeping you comfortable for longer but also allowing it to be layered easily in cooler weather. The sweetheart neckline also contributes to the layering capabilities making it more discreet underneath a wider range of clothing.
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