Most listings use polyester or polyester blends. Some items are 100% polyester, while many swim liners and sets specify polyester blended with about 5–15% spandex for added stretch.
The majority are pull-on styles with elastic waistbands; several listings call out a full elastic waistband designed for easy on/off.
Sizes cover toddler and kids categories. Some listings use toddler sizing, others use kids sizing, and example age ranges shown include about 3 months–5 years or around ages 2–9, depending on the product.
A typical two-piece set pairs a rashguard top with matching swim shorts.
Care instructions commonly recommend machine washing and either tumble drying or hanging to dry. Some listings also suggest hand washing with mild detergent and then hanging to dry.
Swim liners are typically polyester/spandex blends that offer stretch and a snug, boxer-brief–style fit. Listings emphasize all-day comfort, a lower-thigh fit, and quick-dry performance.
Many trunks highlight quick-dry fabric and four-way stretch for mobility. Several listings also mention a compression liner to help keep the fit snug during active play.
Some liners are described as cut and sewn in Los Angeles/USA from imported fabric. A few listings note fair wages for sewers and mention a move toward lower‑impact packaging.
