Ergobaby Alta Hip Seat Baby CarrierFlexible Hip Seat Carrying from Baby to Toddler The Ergobaby Alta Hip Seat Baby Carrier combines a structured carrier with a removable hip seat for flexible carrying from 4 48 months and 12 45 lb 5. 5 20. 4 kg. Breathable mesh, a wide padded waistband, and an ergonomic bucket seat help support comfort for both baby and caregiver. Key Features Converts from a full carrier to a hip seat as your carrying needs change. Four carrier positions: front