I. Core Knowledge: A-Class Standard Is the “Safety Pass” for Infant Clothing
According to China’s mandatory national standard GB 31701-2015 “Safety Technical Code for Textile Products for Infants and Children”, clothing for infants aged 0-36 months (such as onesies, rompers, and underwear) must meet A-class safety requirements. This is the core baseline that distinguishes it from children’s clothing (Class B) and adult clothing (Class C).
II. 3 Key Indicators of A-Class Standard (Clearer with Image-Text Matching)
|
Indicator Category |
Standard Requirement |
Image Caption Suggestion |
Parent-Friendly Explanation |
|
1. Formaldehyde Content |
≤20mg/kg (far lower than Class B’s 75mg/kg) |
Left image: Close-up of A-class hangtag (marked “Formaldehyde ≤20mg/kg”); Right image: Illustration of pungent odor from low-quality clothing |
Clothing with excessive formaldehyde irritates babies’ respiratory tracts; A-class ensures “zero irritation risk”. |
|
2. pH Value Range |
4.0-7.5 (close to babies’ skin pH) |
Left image: pH test strip comparison (A-class strip color matches 4.0-7.5 range); Right image: Illustration of baby’s skin barrier |
Imbalanced pH damages babies’ delicate skin; A-class clothing is as gentle as a “second skin”. |
|
3. Safety Design |
① No sharp seams at neck/cuffs; ② Drawstring length ≤14cm (or detachable); ③ Button pull force ≥70N |
Left image: Close-up of seamless stitched cuffs on A-class onesie; Right image: Warning illustration of unqualified hats with long drawstrings |
Prevents babies from being scratched by seams, strangled by drawstrings, and avoids button detachment (to prevent accidental swallowing). |
III. 10-Second Shopping Tips (Check Quickly with Images)
Check the Hangtag: Prioritize products clearly labeled “Infant Products Category: Class A GB 31701-2015” (Image: Correct A-class hangtag design);
Feel the Fabric: A-class clothing is mostly made of natural fibers like pure cotton or cotton-spandex, with a soft texture and no hard strands (Image: Close-up of hand touching the fabric, compared with rough chemical fiber fabric);
Inspect the Details: Check the inside of the clothing—no excess threads at seams, and labels sewn on the outside (to avoid skin friction) (Image: Close-up of smooth seams inside A-class clothing).
❌ Misconception: “All ‘baby clothes’ must be Class A” — Some merchants vaguely label products as “infant-style” but omit “Class A”; always verify the standard number proactively;
✅ Correct Approach: Even festive clothing like Christmas onesies or holiday outerwear must meet A-class standards if intended for babies aged 0-36 months (Image: Combined image of A-class hangtag + fabric details of a Christmas onesie).

