Can be used from 12 months (10kg) when the child starts walking independently, up to 48 months (18kg). It's compact, so it doesn't take up much space, and it's easy to put on, making it very convenient ^ ^ (Product Material) Material / Specifications Main fabric: 70% cotton, 30% nylon Non-slip: 100% polyester (resin part is acrylic) Filling: 100% polypropylene Binding rubber: 80% rayon, 20% natural rubber Weight: 160g * Always use while supporting with one hand. * If it gets wet from sweat or rain, there is a risk of color transfer to clothing. Please dry it thoroughly before use. Purchased new and used 5-6 times.