This is an ALL IN ONE carrier that can be used as both a baby carrier and a hip seat carrier. The set includes the upper carrier, the hip seat alone, and the baby carrier belt. ◆Product Details◆ 【Age Range】4 months (6kg) to 36 months (15kg) ※For newborns, please use from 14 days after birth and a weight of 3.5kg or more. ※A newborn insert (optional) is required for newborns until they can hold their heads up.