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

$26 ~~$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 (4.6 / 5 · 5 reviews)

Abigail ★★★★★ Oct 22, 2026

The corespun fabric really is as soft as they claim—I barely noticed I was wearing it under my work trousers. Stretches just enough to stay put without digging in, and it’s held up well after a few washes already.

Edward V. ★★★★★ Oct 21, 2026

Took these on a three-day hiking trip and forgot I was wearing them by mile two. The slim fit stays put without digging in, and the merino is stretchy enough that they move with you instead of bunching up.

George ★★★★★ Oct 20, 2026

The corespun fabric is genuinely softer than most merino I’ve tried, and it keeps its shape even after a few wears. I’ve already ordered another one because it’s that comfortable for everyday use.