One-Piece Swimsuits

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    Discover Ui Swim’s one-piece swimsuits, designed in Finland and crafted with sustainable European expertise. Made from our thick, double-layered signature fabric, these swimsuits shape and support while staying comfortable all day.

    Each piece is minimalist, durable, and timeless. Designed to give you confidence whether you’re swimming, sunbathing, or styling it as a bodysuit, Ui Swim one-pieces combine versatile design, ethical production, and a perfect fit.

    13 products
    ★★★★★

    "Ui Swim's swimming shorts are the best I've ever owned, thanks to their high elasticity. I wear them constantly for other sports too, like bouldering."

    Rasmus R
    ★★★★★

    "The thick and supportive fabric is a game-changer. I don't even want to wear my old bikinis anymore!"

    Emma K
    ★★★★★

    "The fabric on these swimsuits is like a hug for your body. I feel incredibly comfortable and supported. Thank you!"

    Lotta H
    ★★★★★

    "The best bikinis ever <3"

    Marika S
    ★★★★★

    "I can't get enough of Ui Swim's one-pieces. They fit like a dream and make me feel so confident. I love wearing them as a top too!"

    Charlotta S