Icebreaker Siren L/S Sweetheart top base layer donna - gritstone heather, taglia S

Experience the ultimate in natural performance with the Icebreaker Siren L/S Sweetheart women's base layer top. Crafted from 100% ZQ-certified Merino wool with an ultralight 150 g/m² fabric weight, this top offers exceptional breathability, odor resistance, and temperature regulation for all-season comfort. The slim fit and sweetheart neckline provide a flattering silhouette, while flatlock seams minimize chafing. Ideal for everyday wear, travel, hiking, or as a layering piece under your favorite jacket.

Advantages

Merino wool is naturally moisture-wicking, temperature-regulating, and odor-resistant, keeping you comfortable during activity and all day long. The ultralight fabric is perfect for layering without bulk, and the sweetheart neckline adds a feminine touch. ZQ certification ensures ethical and sustainable wool sourcing.

Suitable for

• Everyday wear and casual outings
• Travel and outdoor adventures
• Hiking and light trekking
• Layering under jackets or mid-layers

Key specifications

• Product Type: Women's Base Layer Top
• Material: 100% Merino Wool
• Fabric Weight: 150 g/m² (Ultralight)
• Fit: Slim
• Neckline: Sweetheart
• Sleeve Length: Long Sleeve
• Color: Gritstone Heather
• Size: S
• Breathability: High
• Odor Resistance: Natural
• Temperature Regulation: Yes
• Seam Construction: Flatlock seams
• Best Use: Everyday Wear, Travel, Hiking, Layering
• Season: All-season
• Moisture Wicking: Yes
• UV Protection: Natural
• Sustainability Certification: ZQ-certified Merino
• Collection: Siren

Recommendations

For best results, wash with like colors in cold water and lay flat to dry. Avoid fabric softeners and bleach. This top pairs beautifully with the Icebreaker Siren leggings for a complete base layer set.