Icebreaker Siren

The Icebreaker Siren is a soft, flexible short-sleeve functional shirt made with Corespun merino wool fabric. Its natural temperature-regulating properties help keep you warm in cool conditions and pleasantly cool when the weather turns warmer, while the stretch construction moves comfortably with your body.

Designed with a , it feels close to the skin without restricting movement. The lightweight, breathable material makes it a versatile choice for everyday wear, active outdoor pursuits and layering during mountain adventures.