What are the size requirements for children using the Stroller Seat? July 21, 2022 18:19 Updated Use from birth with included, reversible infant insert up to 50 lbs. Related articles G5 Stroller + Seat User Guide G5 Toddler Seat User Guide How do I know my child is old enough to ride while the caregiver jogs? How do I set up my Helix+ attachment? What is your price adjustment policy?