This is a Keratta head impact protection helmet. The usage time was short because the baby took it off immediately. I think it will be useful from the sitting-up stage to when the baby starts walking. It will be compressed for shipping. I think there are no 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.