Wonder Nation Girls Shirts & Tops Wonder Nation School Uniform Interlock Short Sleeve Polo Shirt
Lower concern. Basic school polo with no water/stain treatment.
School uniform polo made from cotton-polyester blend with no apparent water-repellent coating or stain-resistant coatings. Walmart provides no PFAS disclosure; standard apparel fabric poses minimal PFAS risk.
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Material
Cotton-polyester interlock blend
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Azo dyes and colorant residues
Cotton-polyester polos are typically acid or reactive dyed; no independent testing on this specific product is available. Pre-wash release of loose dyes is common and not hazardous once rinsed. Azo dye breakdown into prohibited amines is regulated in EU and some US state standards but not federally mandated for imports; Walmart's supply chain verification is undisclosed.
Antimony in polyester
Polyester yarn may contain antimony trioxide as a catalyst residue from production; levels in apparel are typically low and not bioavailable through wearing. No specific testing data for Wonder Nation products exists. This is a background concern in all polyester textiles and does not distinguish this product from category peers.
Pilling and fiber shedding
Interlock knit polos are prone to surface pilling under friction (backpack straps, washing machine agitation), which is cosmetic rather than a direct health hazard. Shed microfibers enter laundry and water systems; this is an environmental concern shared with all polyester apparel and not specific to Walmart's quality.
Heavy metals
Trace metals (lead, cadmium, chromium) can be present in textile dyes if suppliers lack strict metal screening. Walmart does not disclose dye supplier audits or heavy metal limits. Dermal migration risk from apparel is minimal, but染料 sourcing transparency would reduce uncertainty.
Source, FDA ↗What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Formaldehyde / VOCs
This product is described as an untreated interlock knit with no wrinkle-resistance, waterproofing, or antimicrobial coatings. Formaldehyde-based cross-linking resins are primarily a concern in heavily finished fabrics (wrinkle-free, permanent-press). No finish-related hazard is indicated for a basic school polo.
Source, ATSDR ↗The full breakdown
What it's made of and why it matters
This is a cotton-polyester interlock blend, a common durable knit fabric for school wear. Interlock construction (two jersey layers knitted together) adds body and reduces pilling compared to single-layer knits. The cotton component reduces overall synthetic fiber load and associated chemical treatments, while polyester adds durability and color retention in school washing cycles. No water or stain-resistant coatings are applied, eliminating a major source of PFAS and other persistent finishes.
The brand's record and disclosure
Walmart has not published detailed chemical disclosure or restricted substance lists for its Wonder Nation house brand clothing line. The brand does not highlight certifications like OEKO-TEX or Global Organic Textile Standard (GOTS), which would signal third-party chemical screening. Walmart has faced past scrutiny on labor and supply chain transparency but no specific product recalls or contamination findings are on record for this shirt line. Chemical transparency remains limited compared to premium or sustainability-focused brands.
How it compares in its category
School uniform polos in this price tier typically receive minimal finishing and dye treatment, making this product representative of the low-chemical-burden end of children's apparel. Comparable retailers (Target, Old Navy, Lands' End) offer similar blends with equivalent or slightly better disclosure practices, but material and hazard profiles are broadly similar. Performance and safety expectations for basic school wear are met; this is not positioned as an advanced performance or treated garment.
If you buy it
Wash in cold water before first wear to reduce residual dyes and finishes. Standard home laundering at normal temperatures poses no heat-related hazard with a cotton-polyester blend. Replace when collar, cuffs, or seams show degradation; interlock knits are prone to pilling at stress points, signaling fiber breakdown. Avoid prolonged direct sunlight storage, as polyester can yellow; keep in a cool, dry closet to extend life and maintain color.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Walmart has made none
Formulations change between production runs, so check the current label. How we grade.
More school uniforms grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.