Ruffled swim bottoms are most commonly made from nylon/spandex blends (e.g., 82% Nylon/18% Spandex or 80% Nylon/20% Spandex) and polyester/spandex blends (e.g., 87% Polyester/13% Spandex). Some kids' styles are listed simply as nylon or a nylon/spandex blend.
Common details include ruffle trims or flounces along leg openings, back ruching/scrunch, and patterned ruffle accents (for example, gingham). Descriptions frequently call out ruching and flounce as style features.
Most ruffled swim bottoms use a pull-on closure and are described with regular, classic, or casual fits, depending on the style.
Many styles include an inner or full lining for modesty and comfort; several listings specify lining materials (for example, 82% Nylon/18% Spandex).
They range from low-rise cheeky cuts to mid- and high-rise, retro-inspired high-waist silhouettes that offer more tummy coverage and a leg‑lengthening look.