- Brand: sandesica - Size: M - Target age: 4-9 months - Material: 95% cotton, 5% polyurethane I started using this from 1 month old. At 4 months, when she started rolling over, it became unsafe, so I stopped using it. It says for 6kg-9kg, and my daughter is currently 6kg, but there's no way she'd fit, lol. For your reference. Thank you for looking.