A soft and stretchy women’s long sleeve T-shirt, the Siren Long Sleeve Sweetheart features a slim fit and our corespun merino wool blend fabric with a sweetheart neckline for everyday comfort and layering.


  • Corespun fabric for enhanced durability
  • LYCRA© content for stretch and mobility
  • soft V-neck


  • Weight: 198g / 6.98oz size M
  • Fabric: 83% Wool, 12% Nylon, 5% Elastane

Merino is super lightweight, soft, non-itchy, non-clammy, warm in the cold and cool in the heat, and has a miraculous ability to resist odor. Because it was made in the mountains rather than in a petrochemical laboratory. It's naturally renewable, recyclable and biodegradable.

  • Naturally odor-resistant
  • No-itch comfort
  • Regulates body temperature
Fit Layer Style
Slim Underwear

Fabric Weight

 150 Ultra Lightweight Heat Rating

Weight Scales explained


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.

Size Guide

Women's (cm) XS S M L XL
Bust 82 88 94 100 107
Height 167 168 169 170 171
Fit Charts Explained
SKU: 9420051494534