Organic Cotton Girls' Underwear
Girls' underwear with organic cotton outer layer. Speax is Thinx's children's line.
How scores are calculated
Materials (40%): How plastic-free the product is — raw materials, construction, and coatings.
Packaging (20%): Is the product packaged in plastic? Is it recyclable?
Transparency (20%): Does the brand disclose ingredients, sourcing, and manufacturing?
Durability (20%): How long does it last? Longer-lasting products reduce plastic waste over time.
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Last updated: April 6, 2026
Children's underwear is in direct contact with the most sensitive and absorptive areas of the body for 16+ hours daily. Conventional children's underwear often contains PFAS moisture-wicking treatments, synthetic dyes, formaldehyde anti-wrinkle finishes, and synthetic elastic. Children's skin is more permeable than adult skin, and their developing bodies are more vulnerable to endocrine-disrupting chemicals.
Why We Recommend This Product
Speax's organic cotton girls' underwear is a solid choice. Note: Thinx faced PFAS concerns in 2023 and reformulated their products. Verify the current product is PFAS-free before purchasing.
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