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

$28 ~~$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)

Stella T. ★★★★★ Oct 21, 2026

I’ve been wearing this bikini for a week straight and the slim fit stays put without digging in, which is rare for underwear this lightweight. The merino keeps me comfortable through long days, and it’s stretchy enough that I forget I have it on.

Jacob ★★★★★ Oct 20, 2026

The corespun fabric really does feel softer than regular merino and the slim fit stays put without digging in. I wore them hiking and they were comfortable all day, no bunching or shifting.

Jacob ★★★★★ Oct 19, 2026

This is my third pair and they hold up so well wash after wash. The corespun fabric is lightweight but still feels durable, and the cut sits perfectly under high-waisted jeans without riding up.