Icebreaker Siren Bikini Women's Thermal Underwear Black

Experience unparalleled comfort and performance with the Icebreaker Siren Bikini, a premium women's thermal underwear bottom designed for everyday wear and active adventures. Crafted from a luxurious blend of 83% Merino Wool, 12% Nylon, and 5% LYCRA®, this bikini offers natural odor resistance, exceptional breathability, and a soft, non-itch feel against the skin. The corespun fabric technology wraps nylon fibers in merino wool for enhanced durability without sacrificing comfort. Flatlock seams prevent chafing, while the slim fit and elastic waistband ensure a secure, no-bunch fit under clothing. Ideal for travel, hiking, or daily wear, the Siren Bikini is machine washable and quick-drying, making it a versatile addition to any wardrobe.

Advantages

Natural merino wool regulates temperature, wicks moisture, and resists odors, keeping you fresh all day. The addition of nylon and LYCRA® provides stretch and durability, while flatlock seams eliminate irritation. This bikini is lightweight, breathable, and quick-drying, perfect for active lifestyles.

Suitable for

• Everyday wear
• Travel
• Hiking
• Active pursuits
• All-season layering

Key specifications

• Product Type: Bikini Briefs
• Gender: Women's
• Color: Black
• Size: Medium
• Material: 83% Merino Wool, 12% Nylon, 5% LYCRA®
• Fabric Technology: Corespun
• Fabric Weight: 150 g/m²
• Fit: Slim
• Seam Type: Flatlock seams
• Odor Resistance: Natural (Merino Wool)
• Breathability: High
• Moisture Wicking: Yes
• Quick Drying: Yes
• Waistband: Elastic
• Care Instructions: Machine wash cold, line dry in shade. Do not tumble dry.
• Sustainability: Renewable and biodegradable merino wool

Recommendations

For best results, pair with other Icebreaker merino layers. Wash on a gentle cycle with like colors and avoid fabric softeners. Line dry to maintain shape and performance.