The Boba 4G baby carrier is a baby carrier that you can use from birth, from size 56. In the beginning you use the included baby insert in the baby carrier to carry your child ergonomically and comfortably. From size 68/74 you can omit these. The great thing about the Boba 4G is that it has a high back and footrests are included. This allows you to use the baby carrier up to approximately 98/104, longer than most baby carriers.