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Icebreaker Siren Sweetheart Long Sleeve Shirt - Women's

Icebreaker Siren Sweetheart Long Sleeve Shirt - Women's
  • Color: Gritstone Heather
  • Color: Black
  • Color: Black
Please select options Unavailable


A soft and stretchy women’s T-shirt with an updated fit and fabric that makes it even more comfortable, the Siren Long Sleeve Sweetheart is made with Icebreaker's corespun fabric, soft merino wool fibers wrapped around a nylon core for added strength and durability, while retaining next-to-skin softness.

Ideal for year-round use whether traveling, hiking, or relaxing after a big day outside, the Siren Long Sleeve Sweetheart also features a flattering neckline and a fit that’s perfect for everyday comfort and layering.

  • Merino Corespun - durable merino blend regulates body temperature in all weather conditions.


  • Medium = 137 g / 4.83 oz


  • 83% Wool, 12% Nylon, 5% Elastane


  • 150 Ultralight  
Machine wash warm. Wash inside out with like colors. Do not use softeners. Fasten all closures to wash and dry. Do not bleach. Do not tumble dry. Line dry in shade. Warm iron. Do not iron print, trims and accessories. Do not dry clean.

Part Numbers

Option UPC Store SKU
Gritstone Heather / Small 9420051494510 SHI652442867
Gritstone Heather / Medium 9420051494503 SHI659634757
Gritstone Heather / Large 9420051494497 SHI652415027
Gritstone Heather / X-Large 9420051494527 SHI654145147
Black / X-Small 9420051430310 SHI574770716
Black / Small 9420051430297 SHI575781046
Black / Medium 9420051430280 SHI575082246
Black / Large 9420051430273 SHI574313636
Black / X-Large 9420051430303 SHI575845986