This is a Keratta head impact protection helmet. The usage time was short because the baby took it off immediately. It has been hand-washed and stored at home. I think it will be useful from the sitting-up stage to when the baby starts walking. It will be compressed for shipping. I don't think there are any noticeable stains, but it has been worn once ( ; ; ) 【Size】Head circumference: 42cm～50cm 　　　　Depth: 13cm 　　　　Weight: 65g 【Material】Outer fabric: Cotton 　　　　Mesh: Polyester 　　　　Filling: Polyurethane 【Color】Gray check 【Care】Hand wash gently in lukewarm water below 40 degrees Celsius, then dry flat in the shade. Thank you for looking.