Polyester and nylon might be the default for kids’ swimwear – quick-drying, stretchy, low price point – but beneath the surface, it’s a fabric with a toxic footprint.
Made from PET (polyethylene terephthalate), the same plastic used in water bottles and PA plastics, conventional swimwear is made from synthetic petroleum-based fabric that releases microplastics and toxic compounds every time it’s worn or washed. For children, whose skin and systems are still developing, the risks are even greater.
Why heat + synthetic fabrics = a toxic combo for swimwear
Swimwear is worn in the exact conditions that accelerate the release of harmful substances:
- Heat from the sun and warm water opens skin pores, increasing absorption of chemicals.
- Sweat, chlorine, and saltwater break down plastic fibres, causing them to shed more microplastics.
- Synthetic fabrics emit volatile organic compounds (VOCs), especially when exposed to heat, which contributes to indoor and surface-level air pollution – yes, even outdoors, directly around the child.
- Recycled plastic swimwear is likely to contain higher levels of toxic chemicals than virgin plastics due to high heat and contamination in the recycling process, so it’s not a healthy option.
Why conventional plastic swimwear is toxic for children
Children’s skin is up to 30% thinner than an adult’s, with greater permeability. In practical terms, this means:
- More toxins are absorbed through the skin
- Irritation is more likely, especially in sensitive areas
- Heat rash, itching, eczema and contact dermatitis are often triggered by synthetic fabric blends
Non-toxic swimwear? Organic cotton fabrics for kids
Our Organic Cotton Swimwear range is made from certified organic cotton, designed to protect delicate skin while holding shape in the water.
✔️ No polyester, BPA or phthalates
✔️ Naturally breathable and cool on the skin
✔️ Dyed using non-toxic, safe and gentle inks
✔️ Soft, safe and kind to sensitive skin
The colours will naturally fade over time, a sign of fabric that’s truly clean and chemical-free, but there’s no bobbling, no shape loss, and no microplastic trail left behind.
