Women's Merino 150 Siren Bikini

Women's Merino 150 Siren Bikini - View 3

Women's Merino 150 Siren Bikini - View 4

Women's Merino 150 Siren Bikini - View 5

Women's Merino 150 Siren Bikini - View 6

$25.6 ~~$40~~ In stock

Soft and stretchy merino wool underwear with a modern slim fit, the Siren Bikini features our corespun fabric that’s incredibly soft and durable.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

William V. ★★★★★ Oct 22, 2026

I was initially worried about itchiness, but the merino wool is incredibly soft and the modern slim fit stays perfectly in place all day.

David ★★★★★ Oct 21, 2026

The corespun fabric really does make these feel softer than most merino underwear I've tried, with no itchiness at all. They fit well under leggings without riding up, and after several washes the color and shape are holding up perfectly.

Michael ★★★★★ Oct 20, 2026

I bought these for daily wear and the corespun fabric really does stay soft even after multiple washes. They hold their shape without riding up, which is rare for bikini-style underwear.