All KB Carriers are CPSC Certified and come in two sizes: KB Littles and KB Tots. KB Littles can support babies starting at 6 lbs, up to 45 lbs. We do suggest for babies without good head control, that a baby carrier booster be used for additional support and proper alignment, while in the carrier. As of right now KB does not have a booster available but they may be offered at a later date and time once proper testing has been competed.
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KB Tots can support a maximum weight of 45 lbs. We suggest the Tots size be used when your baby can comfortably fit into 2T pants.